1).Used for disposable syringe 2).With slick and intact appearance 3).Highly sealing ... Size0.3ml, 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 syringeQualitythrough ...