1).Used for disposable syringe 2).With slick and intact appearance 3).Highly ... , 5ml, 10ml, 20ml, 30ml, 50ml, 60ml, 100ml ColorBlackMaterialnature rubber, synthetic rubber(polyisoprene, rubber butyl rubber), silicone rubberFunctionit is a part of disposable syringe, highly ... us. We will do our best to serve you. Disposable Medical Rubber Pistons for Syringe