The TWSBI Pipe is a tube made of stainless steel that will use the ink to the last drop.
TWSBI Pipe is compatible with pens of the series: 580s, 580AL, 580ALR, 580RG, Diamond Mini, Diamond Mini AL and Diamond Mini RG.
Method of use:
TWSBI Pipe should be fitted to the pen section with the built-in converter, then wet and filled with ink.
Material | Stainless steel
Manufactured in Taiwan.