The 3.500 x 4.250 x 0.375 9250 Disogrin Asymmetrical PI Piston Seal by Freudenberg-NOK is engineered for high-performance sealing in hydraulic and pneumatic applications. This piston seal features an asymmetrical design that enhances sealing efficiency and reduces the risk of leakage. With a diameter of 3.500 inches and a thickness of 0.375 inches, it fits a variety of cylinder sizes. The Disogrin material provides excellent wear resistance and temperature stability, ensuring a long service life. This seal complies with industry standards, making it compatible with a range of hydraulic fluids, and is essential for maintaining optimal performance in hydraulic systems.