The PWR 4 x 4.25 x 0.625 9400 Piston Wear Ring from Freudenberg-NOK is engineered for optimal performance in hydraulic systems. With an outer diameter of 4 inches and an inner diameter of 4.25 inches, this wear ring has a thickness of 0.625 inches, making it suitable for various applications. Its design reduces friction and wear, promoting smoother operation and extending the life of hydraulic components. This wear ring complies with industry standards, ensuring compatibility with a range of systems. Enhance your hydraulic system's efficiency and reliability with this high-quality piston wear ring.