Features: 1) All O-Rings are made according to international standard, such as *ISO3601 *AS568A *DIN3771 *BS1806 Features:1) All O-Rings are made according to international standard, such as *ISO3601 *AS568A *DIN3771 *BS1806 2) RoHS directive 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 available 4) NSF-61 approved material.5) All manufacturing processes confirm to the ISO9001, ISO14001 and NSF-61 system 6) Excellent chemical and physical property7) Customers' designs and specifications are acceptedPacking:500pcs/bag

o-rings