Products Introduction The repair kits are mainly composed of main oil seals, dustproof oil seals, guide support rings, o-rings. UN oil seal and dustproof sealing ring double sealing lip and double dustproof lip design, with double function of sealing and dustproof.Not only can prevent mineral powder, metal powder, sediment, rain and other pollutants from the outside into the cylinder;At the same time with high pressure seal ring to double sealing, prevent leakage of oil pollution.