The BVA Hydraulics O-ring features a 4-1/8" internal diameter and a thickness of 1/8", designed for optimal sealing in hydraulic applications. Made from high-quality materials, this O-ring ensures durability and resistance to wear, making it suitable for high-pressure environments. It is compatible with various BVA hydraulic products, providing a reliable seal to prevent leaks and maintain system efficiency. Ideal for both professional and DIY projects, this O-ring is a crucial component for ensuring the longevity and performance of your hydraulic systems.