The TWSBI Pipe is an extension filling device for your TWSBI piston filler, converter, spring loaded converter or international sized converters. Gone are the days of sample bottles that you can't get your TWSBI or other short pens into. This device is a simple fix for getting your full bottles completely empty, and your pens in use.
- Stainless pipe extension
- Fits International converter openings and the Diamond series fountain pen barrels