... make mould base on special plunger design. Products NameSpecification Model Unit PricePacking 1ml *Rubber piston Nature rubber, flat ... rubber, flat tipA,B,C,D modelUSD0.02360ml Rubber pistonNature rubber, flat tipA,B,C,D modelUSD0.032200pcs/ctn380x310x240mmSynthetic ... rubber, flat tipA,B,C,D modelUSD0.051Rubber Needle protective ...