... , friction resistance, anti-aging and ozone, high and low temperature resistance etc 2,Toolings: more than 2 thousand toolings of o-rings ... (black, white, green, red, brown, yellow, purple, pink, translucent, clear etc) 4,Certificate:ISO9001, SGS 5,Shipment terms: By sea, express ... ; Viton; EPDM; SBR; NR; HNBR; PA; PU; CR; F.Silicone etc 8,Size: all sizes are available upon request(OEM & ODM ...