Applied to industrial hydraulic cylinders and cylinders, hoists, moving rods of guide rods, and piston rods (pull rods), and pistons (one-way piston seals) in static pressure UN Radial Rotary Shaft Oil Seal: The UN-type oil seal's inner and outer sealing lip are the same height, with a Y-shape cross-section. Polyurethane (PU) seal is oil resistance, low-temperature resistance, aging resistance, high hardness, elasticity, and easy to install. Advantage: Extrusion resistance, impact resistance, compression deformation, the most suitable for harsh working conditions, and easy to install. Wide Application: UN oil seal is the most widely used oil seal in the hydraulic cylinder, whose main function is to prevent dust, dirt, sand, and metal debris from entering., Weight: 0.110231131 pounds, Manufacturer: JWOO