... rubber o-ring/Medical silicone o-ring We can produce various kinds of O-ring : Rubber O-Ring ,O-Ring Seal , Rubber Product ,Rubber Part ,Silicon O ... -Ring.Various types are available according to your requirements. ... Features:1)Material:It is mainly made of Silicon, Rubber,NBR,NR,EPDM,SBR,IIR,CR materials,non-toxic ...