# TWSBI Diamond Mini Replacement Nib

Replacement nib unit for the TWSBI Diamond Mini range of fountain pens including pens with coloured grips. This is a genuine replacement nib, made in Germany from high quality stainless steel. Supplied as a nib unit assembly(nib feed on a holder) including the stainless steel collar and a clear grip section.

The Diamond Mini nib unit assembly is easy to fit and can be done while the pen is inked:

-   Unscrew the original nib and grip section from the barrel
-   Screw on the new nib and grip section (hand-tight)
-   Option to switch the original grip onto the new assembly if the colour is different
-   Check the nib is sitting square relative to the feed

Size Fine is the most popular for everyday writing, and the 1.1mm Stub for some subtle flair. 

**Features:**

-   Genuine TWSBI Diamond Mini replacement nib unit assembly
-   Polished stainless steel
-   Smooth, consistent ink flow  
    

**Nib Options:**  
Available in EF, F, M, B, 1.1mm and 1.5mm Stub.  

**Compatibility:**  
TWSBI Diamond Mini fountain pens.  
Shares the same nib as Eco and could be used to harvest the nib, including the 1.5mm stub, for Eco, Eco-T, Swipe, Go, and Classic.   
Roughly #5 size, but not a standard interchangeable nib unit for other brands of nibs/pens.

## Details

- **Price:** 39.95 AUD
- **Vendor:** TWSBI
- **Type:** Fountain Pen Replacement Nib

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Extra Fine | 39.95 AUD | In stock |
| Fine | 39.95 AUD | In stock |
| Medium | 39.95 AUD | In stock |
| Broad | 39.95 AUD | In stock |
| 1.1mm Stub | 39.95 AUD | In stock |
| 1.5mm Stub | 39.95 AUD | In stock |

## Images

- TWSBI Diamond Mini Replacement Nib
- TWSBI Diamond Mini Replacement Nib

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> Source: [LarryPOST](https://www.larrypost.com.au/products/twsbi-diamond-mini-replacement-nib)
> Updated: 2026-08-31