The 3.500 x 4.000 x 0.250 9250 Disogrin Asymmetrical PI Piston Seal from Freudenberg-NOK is designed for superior sealing performance in hydraulic and pneumatic systems. This piston seal features an innovative asymmetrical design that enhances sealing capabilities while minimizing leakage. With a diameter of 3.500 inches and a thickness of 0.250 inches, it is compatible with various cylinder sizes. The Disogrin material offers excellent resistance to wear and temperature, ensuring a long-lasting seal. This product meets industry standards for reliability and is suitable for a wide range of hydraulic fluids, making it a versatile choice for demanding applications.