... rubber , or synthetic rubber, 1ml, 2ml, 3ml, 5ml,10ml,20ml,30ml,50ml,60ml, syringe stopperRubber piston for syringe: nature rubber , or synthetic rubber ... , 1ml, 2ml, 3ml, 5ml,10ml,20ml,30ml ... short type, butyl rubberGrey colorUSD0.0880,000pcs/ctn380x310x24cm Stopper for Syringe