... quality products at rational prices and best service. Features:1) AS-568, PG standard and non-standard size gaskets2) ... (FKM), neoprene, HNBR, NBR+PVC, NBR, natural rubber, SBR, IR, IIR(butyl rubber), CR (neoprene), EPDM, SBR, AU, ACM, ... and NSF-61 system 5) Excellent chemical and physical property6) Customers' designs and specifications are acceptedPacking:500pcs/bag molding silicone rubber seals