For Shallow Type Switches (Three-Way, Single, and Double Pole) and Receptacles, Including Three-Wire Hicking Receptacles and Single-Gang Combination Devices. Base Has 1/2" Trade Size Kos. Position Of Twistouts On Ends Permits Running Raceways Close to Interior Trim. Accepts Nema Single-Gang Standard Faceplates. Note: Certified to Canadian Safety Standards For Sale In Canada. When Ordering These Products, Change The "V" Color Prefix to "VC" or The "WH" Color Suffix to "WHC" to Denote The Canadian Versions.