... . Features:1) AS-568, PG standard and non-standard size O-rings 2) Various colors available, such as black, green, yellow, blue ... compliant green products3) Available materials: silicone, fluoro silicone, viton(FKM), neoprene, HNBR, NBR+PVC, NBR, natural rubber, SBR, IR, IIR(butyl ... rubber), CR (neoprene), EPDM, SBR, AU, ACM, CO; wide range of materials are ...