The Brass Seat Nut for 120WC11 with 4" O-Rings is designed for secure sealing in plumbing applications. Made from high-quality brass, this seat nut offers excellent corrosion resistance and durability. Its 4" size ensures compatibility with the 120WC11 system, providing a reliable fit. The included O-rings enhance sealing performance, preventing leaks and ensuring optimal functionality. This component is essential for maintaining the integrity of your plumbing systems. Trust Matco Norca for quality parts that enhance system reliability.