... 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 Part ,Silicon O-Ring.Various types are ... 1)Material:It is mainly made of Silicon, Rubber,NBR,NR,EPDM,SBR,IIR,CR materials,non-toxic,no posion, ... 's innocuous and safe and widely used in the auto,motorcyle,oil and gas machine Rotary application and other ...