Oatey 72147 PVC General Purpose Drain with 6-Inch BR Grate and Square Ring, 3-Inch or 4-Inch Designed for use in finished areas where moderate to heavy traffic is expected Drains offered in three base sizes: 4-Inch Hub Drain Base, 4-Inch Pipe Drain Base, 3-Inch or 4-Inch Pipe Drain Base (fits over 3-Inch pipe and inside 4-Inch pipe) Barrel length allows for 1-3/4-Inch height adjustment PVC drains designed to comply with ASTM D2665 ABS drains designed to comply with ASTM D2661