UN 30/31.5*36/37/38/40/41.5/42/43/45/46.5/47/48/50/52*5/5.5/6/6.5/7/8/10/12 PU Shaft Piston Rod U/Y Gasket Hydraulic Oil Seal This hydraulic oil seal is designed for use with piston rods in hydraulic systems.It features a U/Y gasket configuration made from polyurethane material, providing sealing performance in dynamic applications.The seal has an inner diameter range of 30 to 52 mm, outer diameter options from 36 to 52 mm, and thicknesses between 5 and 12 mm, accommodating various shaft sizes.Suitable for industrial and mechanical , it helps prevent fluid leakage and maintain system pressure under operating conditions.Notice: This replacement item is produced by an independent supplier.All brand and model mentions are for compatibility purposes only.