Slim-line profile for 1" backing. Ribbed walls add support for greater strength and better alignment. Adjustable faceplate accommodates up to 5/8" wall thickness. Top and bottom nailing tabs assure solid installation. Constructed of high-impact plastic. Valve certified to ASME A112.18.1 Standard. Quarter Turn Ball Valve. Dimensions: Box: 5-3/16" x 5-3/16" x 2-1/2". Faceplate: 6-13/16" x 6-13/16". All valves are 1/2" inlet x 1/4" outlet, unless otherwise noted. All boxes are assembled.