... 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,50ml,60ml,80ml ... base on special plunger design. Products NameSpecification Model Unit PricePacking 1ml *Rubber piston Nature rubber, flat tipA,B,C,D modelUSD0 ...