... stopper Rubber piston for syringe: nature rubber , or synthetic rubber, 1ml, 2ml, 3ml, 5ml,10ml,20ml,30ml,50ml,60ml, syringe stopperRubber piston for ... ,20ml,30ml,50ml,60ml,80ml,100ml,there are different model for each size, we can make mould base on special plunger ... type ,and short type, butyl rubberGrey colorUSD0.0880,000pcs/ctn380x310x24cm Stopper for Syringe