Oatey 38970 Offset Drain with 1/4 Turn Valve and Mounted Water Hammer Arrestor, 2-Inch High impact polystyrene. 4 support brackets. Easy drain knockout. Top mount knockouts. Box Dimensions: 8-3/4""W x 7-1/2""H x 3-5/8""D. Faceplate Dimensions: 11-3/4""W x 10-1/8""H. Packaged in display carton or polybag for improved merchandising