The FAAC 7090815 O-ring is a precision sealing component designed for the retract tube in FAAC 400 hydraulic gate operators, specifically for units updated after the 05/06 design change. This O-ring ensures a secure and leak-proof seal, maintaining proper hydraulic pressure and guaranteeing consistent system performance. Manufactured from high-quality elastomer materials, it offers excellent resistance to wear, pressure, temperature fluctuations, and hydraulic fluids. Engineered for exact fit and compatibility with post-2006 FAAC 400 models, this genuine replacement part is essential for maintenance and repair, helping extend the lifespan and efficiency of automatic gate systems.