... : as customized 2,MOQ:5000pcs 3,Material: silicone 4,OEM & ODM warmly welcomed Dustproof Silicone O Rings:1,Performance: FDA grade, oil resistance ... accessories, and auto parts for sealing. 7, Materials: NBR; FKM; Silicone; Viton; EPDM; SBR; NR; HNBR; PA; PU; CR; F ... .Silicone etc 8,Size: all sizes are available upon request(OEM & ODM products warmly welcomed) Dustproof Silicone O Rings