... -568, PG standard and non-standard size O-rings 2) Various colors available, such as black, green, yellow, blue, red 2) RoHS ... directive compliant green products3) Available materials: silicone, fluoro silicone, viton(FKM), neoprene, HNBR, NBR+ ... , SBR, AU, ACM, CO; wide range of materials are available 4) All manufacturing processes confirm to the ISO9001, ISO14001 and ...