U RING(U RING/ PISTON & ROD SEAL) 1. ISO9001, RoHS, REACH, UL 2. Material: ... NOK/ VALQUA STANDA U RING(U RING/ PISTON & ROD SEAL) WHY CHOOSE US?1. NOK and VALQUAstandard.2. Reasonable ... UL, NSF, WRAS, etc.Our rubber products include: bearing seal, valve rubber products, o ring kit, o ring, x ... ring, v ring, oil seal, wiper seal, u ring, rod seal, piston seal, rubber cord, etc. The molded rubber ...