The 3.500 x 4.000 x 0.375 9250 Disogrin Asymmetrical PI Piston Seal from Freudenberg-NOK is engineered for high-performance sealing in hydraulic and pneumatic applications. This piston seal features a unique asymmetrical design that enhances sealing efficiency and reduces leakage. With a diameter of 3.500 inches and a thickness of 0.375 inches, it is suitable for various cylinder sizes. The Disogrin material provides excellent resistance to wear and temperature fluctuations, ensuring a long service life. This seal meets industry standards for reliability and is compatible with a range of hydraulic fluids, making it a versatile choice for demanding applications.