Watco Manufacturing 500-TQ-ABS-CP 1.5-Inch ABS Piping Quick Adjust Trip Lever Tubular Plastic Drain Waste and Overflow Kit, Chrome Plated Includes a retainer plate for overflow elbow Manufactured in compliance with ASTM F 409-2002, NSF/ANSI 14-2007, and CSA standards B181.1 and B181.2 Strainer body and drain ell thread size: 1-1/2-Inch - 11-1/2 NPSM (course thread), 1.865-Inch outside thread diameter, 11.5 threads per Inch ABS piping Fits most tubs 14-16-Inch high