This bulb syringe is ideal for cleaning your pens which fill with a cartridge or converter. Simply fill the syringe with water, by drawing it from a glass of water. Insert the opening at the end where the cartridge would sit (take out the cartridge 1st) press it in the section end and squeeze so the water comes out trough the nib. Do this until the water comes out clear.
Caran d'Ache Pencil sharpener Matterhorn Brut Rose, limited edition of 4478 pieces