... 10ml, 20ml, 30ml, 50ml, 60ml, 100ml ColorBlackMaterialnature rubber, synthetic rubber(polyisoprene, rubber butyl rubber), silicone rubberFunctionit is a part of disposable syringe, ... performance, prevent liquid overflow from syringeQualitythrough ISO9001 standard; steady quality; no bacilli, no toxicityPacking Poly bag and carton, ... We will do our best to serve you. Rubber Piston for Medical Syringe