... / 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 ... research and development by us. U CUP SEAL/ U RING(U RING/ PISTON & ROD ...