The T&S Brass 010389-45 O-Ring is designed specifically for waste drain valve plungers. With a thickness of 7/32", an inner diameter of 1-11/16", and an outer diameter of 2-1/8", this O-Ring ensures a secure and reliable seal. Constructed to meet UL standards, it provides durability and performance for efficient waste drainage applications. Ideal for maintaining optimal functionality in plumbing systems.