Will accommodate commercially available straight blade and locking single receptacles with face diameters of 1.38-1.40 (35-36mm). Base has 1/2 and 3/4 trade size concentric KOs. Nonmetallic cover has 1500 and 2600 Series Raceway twistouts on all four sides. Two 1500WC Wire Clips included. Gray finish. NOTE: Certified to Canadian Safety Standards. For sale in Canada. When ordering these products, add C prefix to part number to denote the Canadian version, i.e C1546A.