syringe stopper Rubber piston for syringe: nature rubber , or synthetic rubber, 1ml, 2ml, 3ml, 5ml, ... ,10ml,20ml,30ml,50ml,60ml,80ml,100ml,there are different model for each size, we can make mould base on special plunger ... design. Products NameSpecification Model Unit PricePacking 1ml *Rubber piston Nature rubber, flat tipA,B ...