Oatey 38472SP Fire-Rated Washing Machine Outlet Box, &frac12;&rdquo; ASTM F1807 PEX Connections, Single Pack, 1/4 Turn Brass Ball Valves Warnock Hersey certified, for 1-hour and 2-hour fire-rated walls. 2" drain opening fits PVC or ABS Schedule 40 DWV pipe. Box made of Bulk Molding Compound (BMC) with UL-classified intumescent pads and UL-classified insulating material. Adjustable metal mounting brackets, easy to remove test cap. Flexible valve/drain arrangement capabilities. Box Dimensions: 8-1/3"W x 5-1/2"H x 3-3/4"D. Faceplate Dimensions: 10-1/5"W x 7-2/5"H.