TWSBI Pipe

A stainless steel extension to help you get to the bottom of every ink bottle. Fits the TWSBI Diamond series fountain pens, and standard international converters.

Stainless Pipe extension to help you get to the bottom of ink bottles
Fits the TWSBI Diamond series fountain pens: 580s, 580AL, 580ALR, 580RG, Diamond Mini, Diamond Mini AL, Diamond Mini RG and also fits TWSBI and standard international converters and also on those for Pilot such as the CON 40.