... .3ml, 0.5ml, 1ml, 2ml, 3ml, 5ml, 10ml, 20ml, 30ml, 50ml, 60ml, 100ml ColorBlackMaterialnature rubber, synthetic rubber(polyisoprene, rubber butyl ... rubber), silicone rubberFunctionit is a part of disposable syringe, highly sealing and sliding performance, prevent liquid overflow from ... us. We will do our best to serve you. Medical Disposable Rubber Pistons for Syringe