Leviton White Plastic Incandescent Lampholder with 4 Terminal Screws

1-piece, incandescent, outlet box plastic lampholder. Keyless, top wired, medium base socket. 4-1/2 inch outside diameter, fits 3-1/4 inch or 4 inch outlet box. 600-watt/600-volt. UL (Underwriter's Laboratories) and CSA (Canadian Standards Association) listed. White.