Constructed from high-quality rubber, this O-ring is essential for maintaining flushometer valves in various models, including Optima, Royal, and Regal. With an inside diameter of 1-1/8 inches and an outside diameter of 1-3/8 inches, it ensures a secure fit to prevent leaks. Available in a convenient 24-pack, this component is perfect for commercial applications and regular maintenance needs. Its lightweight design makes it easy to handle and install, ensuring reliable performance in your plumbing system.