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TWSBI

TWSBI

Watch your ink come alive

TWSBI fountain pens are known for modern piston-filling mechanisms, ink capacity and transparent designs. Fitted with German made nibs, they perform well straight out of the box. The Diamond 580 is the everyday writer, with a screw-off nib unit for easy nib changes and compatibility with the Diamond Inkwell. The Eco offers a simplified design with a friction fit nib and feed. Lesser known models include vacuum fillers with an ink shut-off valve for travel and the Swipe offering the convenience of standard cartridges or a spring converter. Good value range of soluble fountain pen inks supplied in frosted glass bottles. TWSBI pens are high flow, making them the ideal choice for our artist sketch kits. For further help with pen selection, see the TWSBI Top 7 list annotated by our staff. Visit our Blog for tips on pen cleaning and piston servicing.

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TWSBI Eco Fountain Pen - Slate Blue with Onyx - Fine Nib

$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

Limited edition TWSBI Slate Blue coloured coloured Eco with Onyx trim, launching 28 March 2025. TWSBI Eco combines simplicity and elegance in this ...

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$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

TWSBI Eco Fountain Pen - Slate Blue with Onyx - Broad Nib

$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

Limited edition TWSBI Slate Blue coloured coloured Eco with Onyx trim, launching 28 March 2025. TWSBI Eco combines simplicity and elegance in this ...

View full details
$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

TWSBI Eco Fountain Pen - Slate Blue with Onyx - Medium Nib

$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

Limited edition TWSBI Slate Blue coloured coloured Eco with Onyx trim, launching 28 March 2025. TWSBI Eco combines simplicity and elegance in this ...

View full details
$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

TWSBI Eco Fountain Pen - Slate Blue with Onyx - 1.1mm Italic (stub) Nib

$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

Limited edition TWSBI Slate Blue coloured coloured Eco with Onyx trim, launching 28 March 2025. TWSBI Eco combines simplicity and elegance in this ...

View full details
$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

TWSBI Eco Fountain Pen - Slate Blue with Onyx - Extra Fine Nib

$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95

Limited edition TWSBI Slate Blue coloured coloured Eco with Onyx trim, launching 28 March 2025. TWSBI Eco combines simplicity and elegance in this ...

View full details
$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95
Current ink stock is 45mL round bottle

TWSBI Eco Sketch Kit (Clear / Black Fine & DE ATRAMENTIS Document Black 45mL)

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Clear / Black - Fine & DE ATRAMENTIS Document Urban Sienna 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco-T Sketch Kit - Clear / Mint Blue Fine & DE ATRAMENTIS Document Black 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco-T Fountain Pen - Fine nib (big ink capacity...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco-T Sketch Kit - Clear / Mint Blue - Fine & DE ATRAMENTIS Document Grey 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco-T Fountain Pen - Fine nib (big ink capacity,...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco-T Sketch Kit - Clear / Mint Blue - Fine Nib & DE ATRAMENTIS Document Urban Sienna 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco-T Fountain Pen - Fine nib (big ink capacity,...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / White - Fine Nib & DE ATRAMENTIS Document Black 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / White - Fine Nib & DE ATRAMENTIS Document Urban Sienna 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / White - Fine Nib & DE ATRAMENTIS Document Urban Grey 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / White - Fine Nib & DE ATRAMENTIS Document Brown 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Clear / Black - Fine & DE ATRAMENTIS Document Brown 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91
Current ink stock is 45mL round bottle

TWSBI Eco Sketch Kit (Clear / Clear Fine Nib & DE ATRAMENTIS Document Black 45mL)

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Clear / Clear - Fine & DE ATRAMENTIS Document Urban Sienna 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Clear / Clear - Fine & DE ATRAMENTIS Document Brown 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Persian Green - Fine Nib & DE ATRAMENTIS Document Ink - Black - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Persian Green - Fine Nib & DE ATRAMENTIS Document Ink - Urban Sienna - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Persian Green - Fine Nib & DE ATRAMENTIS Document Ink - Urban Grey - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Persian Green - Fine Nib & DE ATRAMENTIS Document Ink - Brown - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Persian Green - Fine Nib & DE ATRAMENTIS Document Ink - Sepia Brown - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Cerulean Blue - Fine Nib & DE ATRAMENTIS Document Ink - Black - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Cerulean Blue - Fine Nib & DE ATRAMENTIS Document Ink - Urban Sienna - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Cerulean Blue - Fine Nib & DE ATRAMENTIS Document Ink - Brown - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Cerulean Blue - Fine Nib & DE ATRAMENTIS Document Ink - Sepia Brown - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit (Clear / Transparent Yellow Fine & DE ATRAMENTIS Document Ink Black 45mL)

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Transparent Yellow - Fine Nib & DE ATRAMENTIS Document Ink - Urban Sienna - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Transparent Yellow - Fine Nib & DE ATRAMENTIS Document Ink - Brown - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI Eco Sketch Kit - Clear / Transparent Yellow - Fine & DE ATRAMENTIS Document Ink - Sepia Brown - 45mL

$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91

TWSBI 1791 Fountain Pen Ink - Combo Colour Set 6 x 18mL

$89.95 - $89.95
$89.95
$89.95 - $89.95
$89.95

The 1791 series comes from a book written in China in the year 1791 called Dream of Red Chambers. It is one of China's 4 great classical novels an...

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$89.95 - $89.95
$89.95
$89.95 - $89.95
$89.95

TWSBI Eco Clear / Black - Fine & DE ATRAMENTIS Document Urban Grey 45mL

$96.90
$96.90 - $96.90
$96.90
$89.95
$89.95 - $89.95
$89.95

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$96.90
$96.90 - $96.90
$96.90
$89.95
$89.95 - $89.95
$89.95

TWSBI Eco Clear / Clear - Fine & DE ATRAMENTIS Document Urban Grey 45mL

$96.90
$96.90 - $96.90
$96.90
$89.95
$89.95 - $89.95
$89.95

This Sketch Kit contains the optimum fountain pen set-up for heavy duty sketchers. Includes: TWSBI Eco Fountain Pen - Fine nib (big ink capacity, ...

View full details
$96.90
$96.90 - $96.90
$96.90
$89.95
$89.95 - $89.95
$89.95

TWSBI Eco Fountain Pen - Amazonite - Fine Nib

$69.95 - $69.95
$69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system, TWSBI has been able to cre...

View full details
$69.95 - $69.95
$69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco Fountain Pen - Amazonite - Medium Nib

$69.95 - $69.95
$69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system, TWSBI has been able to cre...

View full details
$69.95 - $69.95
$69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco Fountain Pen - Amazonite - Broad Nib

$69.95 - $69.95
$69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system, TWSBI has been able to cre...

View full details
$69.95 - $69.95
$69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco Fountain Pen - Amazonite - 1.1mm Italic (stub) Nib

$69.95 - $69.95
$69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system, TWSBI has been able to cre...

View full details
$69.95 - $69.95
$69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco Fountain Pen - Matcha Green - Medium Nib

$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95

Matcha is a finely ground powder of  green tea specially processed from shade-grown tea leaves. Shade growing gives matcha its characteristic brigh...

View full details
$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco Fountain Pen - Matcha Green -1.1mm Italic (stub) Nib

$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95

Matcha is a finely ground powder of  green tea specially processed from shade-grown tea leaves. Shade growing gives matcha its characteristic brigh...

View full details
$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco Fountain Pen - Matcha Green - Broad Nib

$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95

Matcha is a finely ground powder of  green tea specially processed from shade-grown tea leaves. Shade growing gives matcha its characteristic brigh...

View full details
$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95

TWSBI Eco Fountain Pen - Matcha Green - Extra Fine Nib

$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95

Matcha is a finely ground powder of  green tea specially processed from shade-grown tea leaves. Shade growing gives matcha its characteristic brigh...

View full details
$69.95 - $69.95
$69.95
$69.95 - $69.95
$69.95
TWSBI Diamond 50 Ink Well (Empty) - Polished Aluminium

TWSBI Diamond 50 Ink Well (Empty) - Polished Aluminium

$64.95 - $64.95
$64.95
$64.95 - $64.95
$64.95

The perfect fountain pen deserves the perfect ink well bottle.TWSBI Diamond 50 ink bottle provides mess free filling for: TWSBI Diamond 530, 540, 5...

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$64.95 - $64.95
$64.95
$64.95 - $64.95
$64.95

TWSBI Eco Fountain Pen - Sky Blue - 1.1mm Nib (includes Pelikan 4001 Royal Blue 62.5mL ink)

$59.95 - $59.95
$59.95
$64.95
$64.95 - $64.95
$64.95

TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system, TWSBI has been able to cre...

View full details
$59.95 - $59.95
$59.95
$64.95
$64.95 - $64.95
$64.95
TWSBI Eco Fountain Pen - Clear / Black

TWSBI Eco Fountain Pen - Clear / Black - 1.1 Italic (stub) Nib

$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95

TWSBI has changed the game! TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system...

View full details
$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95
TWSBI Eco Fountain Pen - Clear / Black

TWSBI Eco Fountain Pen - Clear / Black - Broad Nib

$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95

TWSBI has changed the game!TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system,...

View full details
$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95
TWSBI Eco Fountain Pen - Clear / Black

TWSBI Eco Fountain Pen - Clear / Black - Extra Fine Nib

$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95

TWSBI has changed the game!TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system,...

View full details
$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95
TWSBI Eco Fountain Pen - Clear / Black

TWSBI Eco Fountain Pen - Clear / Black - Fine Nib

$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95

TWSBI has changed the game! TWSBI Eco combines simplicity and elegance in this very contemporary fountain pen. By using a piston ink-filling system...

View full details
$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95

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