Slim-line profile allows for 1 in backing. Ribbed walls add support for greater strength and better alignment. Adjustable faceplate accommodates up to 5/8 in wall THK. Top and bottom nailing tabs assure solid installation. Valve certified to ASME A112.18.1/CSA B125.1 Standard. Quarter Turn Ball Valve. Dimensions: Box: 5-1/8 in x 5-5/8 in x 2-1/2 in. Faceplate: 6-13/16 in x 6-13/16 in. All boxes are unassembled.