Help for filling the Diamand filler. Unscrew the spring module, put on the pipe and dip it into the barrel. The stainless steel pipe extension, allows to reach the bottom of the ink bottles. Fits TWSBI Diamond series fountain pens: 580s, 580AL, 580ALR, 580RG, Diamond Mini, Diamond Mini AL, Diamond Mini RG. Also fits TWSBI converters: Spring converter, traditional converter. (Top part fits international standard size).
