... slick and intact apperance 3.Highly sealing and sliding performance Syringe stoppers (1)Material: nature rubber,synthetic rubber(polyisoprene,rubber,buty ... silicone rubber;(2)Function: it it a part of disposable syringe,highly sealing and sliding performance,prevent liquid overflow from ... )Size and color: 0.5ml,lml,2ml,3ml,5ml,10ml,20ml,30ml,50ml,100ml.... black ,white....;(5)Packing: polybag and ...