TWSBI Diamond Mini Replacement NibReplacement 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
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