... specifications; 4. supply OEM service. China supplier PU seal(rod seals/piston seals/wipers):1) Available material: PU;2) Certification: ISO9001: ... samples and drawings are accepted.Rod seals: USH, DHS, UNS, UNR, UHR, IDU, IDI, ISI;Piston seals: UNP, UHP, ODU, ODI, ... OSI, USI;Wipers: LBI, WA1. China supplier PU seal(rod seals/piston seals/wipers)