O-ring Material: EPDM,SBR NR,NBR and Silicone Any size and color are available O-ring (Rubber o-ring, ... Features: 1) Main products: O-rings (AS-568 standard, PG standard and any non-standard o-ring), washer, oil seal, cup seals, gaskets ... best low temperature flexibility7) Good resistance to sunlight, ozone, and weathering, and has moderate oil resistance8) Precision moulded elastomer seals available