... AS-568, PG standard and non-standard O-rings Features:1) Main products: O-rings (AS-568 standard, PG standard and any ... ), washer, oil seal, cup seals,gaskets, U-rings, V-rings, Y-rings, back-up rings, etc.2) Custom design rubber parts3) NSF approved ... temperature from - 60oF to 450oF, excellent dry heat resistance, best low temperature flexibility8) Good resistance to sunlight, ozone, and weathering ...