... ) O-ring (Rubber o-ring,Silicone o-ring,o-ring seal) Features: 1) Main products: O-rings (AS-568 standard, PG ... standard and any non-standard o-ring), washer, oil seal, cup seals, gaskets, U-rings, V-rings, Y-rings, back ... , ozone, and weathering, and has moderate oil resistance8) Precision moulded elastomer seals available