... ISO9001-2000standard 3)Specification in customized 4)long service time. Flat silicone rubber o-ring/Medical silicone o-ring We can produce various kinds ... of O-ring : Rubber O-Ring ,O-Ring Seal , Rubber Product ,Rubber ... . Features:1)Material:It is mainly made of Silicon, Rubber,NBR,NR,EPDM,SBR,IIR,CR materials,non-toxic,no ...