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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 Obsidian Fountain Pen (Limited Edition) - Mixed black resin with rose gold trim and nib

$249.95 - $249.95
$249.95
$249.95
$249.95 - $249.95
$249.95

A limited edition piston filler in high gloss black resin, with rose gold plated details. Full sized and with good balance, it feels solid in the h...

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$249.95 - $249.95
$249.95
$249.95
$249.95 - $249.95
$249.95

TWSBI Diamond 580ALR Black Fountain Pen - Clear body with Black trim - Medium Nib

$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

With TWSBI the game has changed! TWSBI combine simplicity and elegance in the very contemporary Diamond 580 fountain pen. By using a piston ink-fil...

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$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

TWSBI Diamond 580ALR Black Fountain Pen - Clear body with Black trim - Extra Fine Nib

$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

With TWSBI the game has changed! TWSBI combine simplicity and elegance in the very contemporary Diamond 580 fountain pen. By using a piston ink-fil...

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$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

TWSBI Diamond 580ALR Black Fountain Pen - Clear body with Black trim - Fine Nib

$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

With TWSBI the game has changed! TWSBI combine simplicity and elegance in the very contemporary Diamond 580 fountain pen. By using a piston ink-fil...

View full details
$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

TWSBI Diamond 580ALR Black Fountain Pen - Clear body with Black trim - Broad Nib

$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

With TWSBI the game has changed! TWSBI combine simplicity and elegance in the very contemporary Diamond 580 fountain pen. By using a piston ink-fil...

View full details
$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

TWSBI Diamond 580ALR Black Fountain Pen - Clear body with Black trim - 1.1mm Italic (stub) Nib

$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

With TWSBI the game has changed! TWSBI combine simplicity and elegance in the very contemporary Diamond 580 fountain pen. By using a piston ink-fil...

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$129.95 - $129.95
$129.95
$129.95
$129.95 - $129.95
$129.95

TWSBI Eco Fountain Pen - Black Marble with Bronze Trim and Nib

$110.95 - $110.95
$110.95
$110.95
$110.95 - $110.95
$110.95

The 2026 Limited Edition TWSBI Eco Black Marble with bronze coloured plated trim and nib. The global release is 6th February, and if you register y...

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$110.95 - $110.95
$110.95
$110.95
$110.95 - $110.95
$110.95
TWSBI Diamond Mini Classic Fountain Pen - Black / Clear

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

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

TWSBI combine simplicity and elegance in the very contemporary Diamond Mini Classic fountain pen. By using a piston ink-filling system, TWSBI has ...

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$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95
TWSBI Diamond Mini Classic Fountain Pen - Black / Clear

TWSBI Diamond Mini Fountain Pen - Black / Clear - Broad Nib

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

TWSBI combine simplicity and elegance in the very contemporary Diamond Mini Classic fountain pen. By using a piston ink-filling system, TWSBI has ...

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$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95
TWSBI Diamond Mini Classic Fountain Pen - Black / Clear

TWSBI Diamond Mini Fountain Pen - Black / Clear - Extra Fine Nib

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

With TWSBI the game has changed!TWSBI combine simplicity and elegance in the very contemporary Diamond Mini Classic fountain pen. By using a pisto...

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$109.95 - $109.95
$109.95
$109.95 - $109.95
$109.95
TWSBI Diamond Mini Classic Fountain Pen - Black / Clear

TWSBI Diamond Mini Fountain Pen - Black / Clear - Fine Nib

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

With TWSBI the game has changed! TWSBI combine simplicity and elegance in the very contemporary Diamond Mini Classic fountain pen. By using a pisto...

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$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, ...

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$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, ...

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$104.90
$104.90 - $104.90
$104.90
$95.91
$95.91 - $95.91
$95.91
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,...

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$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
TWSBI Eco Fountain Pen - Clear / Black

TWSBI Eco Fountain Pen - Clear / Black - Medium 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,...

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$59.95 - $59.95
$59.95
$59.95
$59.95 - $59.95
$59.95
TWSBI Precision Ballpoint Pen -1.0mm - Black

TWSBI Precision Ballpoint Pen - 1.0mm - Black

$49.95 - $49.95
$49.95
$49.95 - $49.95
$49.95

With over 20 years experience in making ballpoint pens, TWSBI knows how to make them to last.Constructed from stainless steel.Takes a standard Park...

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$49.95 - $49.95
$49.95
$49.95 - $49.95
$49.95
TWSBI Precision Fix Pipe Mechanical Pencil - 0.7mm - Black

TWSBI Precision Fix Pipe Mechanical Pencil - 0.7mm - Black

$49.95 - $49.95
$49.95
$49.95 - $49.95
$49.95

With over 20 years experience in making mechanical pencils, TWSBI knows how to make them to last. Constructed from all metal parts internally and e...

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$49.95 - $49.95
$49.95
$49.95 - $49.95
$49.95
TWSBI Precision Fix Pipe Mechanical Pencil - 0.7mm - Black

TWSBI Precision Retractable (RT) Pipe Mechanical Pencil - 0.7mm - Black

$49.95 - $49.95
$49.95
$49.95 - $49.95
$49.95

With over 20 years experience in making mechanical pencils, TWSBI knows how to make them to last. Constructed from all metal parts internally and e...

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$49.95 - $49.95
$49.95
$49.95 - $49.95
$49.95
TWSBI VAC20A Ink Well (Empty)

TWSBI VAC20A Ink Well (Empty) - Black

$34.95 - $34.95
$34.95
$34.95 - $34.95
$34.95

The perfect fountain pen deserves the perfect ink well bottle.TWSBI VAC20A ink bottle uses 3 caps to provide mess free filling for: TWSBI Vac Mini ...

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$34.95 - $34.95
$34.95
$34.95 - $34.95
$34.95

TWSBI Ink Cartridges - Black - Pack of 10

$13.95 - $13.95
$13.95
$13.95 - $13.95
$13.95

TWSBI Ink Cartridges - pack of 10. These cartridges are larger than normal, holding 1.5ml. Designed for the TWSBI Swipe fountain pen.

$13.95 - $13.95
$13.95
$13.95 - $13.95
$13.95

TWSBI Eco Replacement Feed

$8.95 - $8.95
$8.95
$8.95 - $8.95
$8.95

TWSBI Eco Replacement Feed

$8.95 - $8.95
$8.95
$8.95 - $8.95
$8.95
Sold out

TWSBI Fountain Pen Ink - Black - 70mL

$29.95 - $29.95
$29.95
$29.95 - $29.95
$29.95

To use with the Diamond 50 Ink Well (available separately), remove the lid from the ink bottle and recap the bottle with the lid from the Diamond 5...

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$29.95 - $29.95
$29.95
$29.95 - $29.95
$29.95
Sold out

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