Rubber Bulb, Strong Elasticity Laboratory Suction Ball for Discharge Air And Absorb Liquid : Amazon.co.uk: Business, Industry & Science
Mold problems? Check your bulb syringe. When cleaning today I “backwashed” my bulb and got several flakes of mold/mildew in the water. Didn't document but 10 or so 5mm flakes. : r/fountainpens