Leviton Socket Adapter, 1-Piece, 660 W Lamp, 250 V, Incandescent Lamp, Medium to Medium Base, Screw-In, Hole Mounting, Glazed Porcelain Shell, Aluminum Screw Shell, White, 1.63 in Diameter, 2.19 in Overall Length, UL E13396, CSA LR-1863, ISO 9001, 1-3/8 in Mounting Hole, For Commercial Applications