silicone o-rings 1.material:NBR,NR,SILICON,FKM,PTFE,EPDM,Viton. 2.working.temperature:-40c~+120c 3.size:as ... and dynamic seal, main material contains: NBR,SR,VITON,SILICON PTFE,HNBR,PU etc. Feature of O-Ring :1. Several material ... oil seal, O-Ring and rubber gasket like: NBR, HNBR, CR, PDFE, EPDM, SILICONE, VITONE, etc. Can choose on your requirement ...