Feature●This closure assembly features a thread of 1.625" O.D. x 11.5 - 1.25"●Flange O.D. of 2.82"●Type: Tub and Shower - Style: Waste and OverflowDescription The "Watco System" - A family of quality bath waste products that results in lower total-installed, walkaway costs with a dramatic reduction of call-backs.