Leviton Socket Adapter, 1-Piece, 660 W Lamp, 250 V, Incandescent Lamp, Mogul to Medium Base, Screw-In 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. Leviton Socket Adapter, 1-Piece, 660 W Lamp, 250 V, Incandescent Lamp, Mogul to Medium Base, Screw-In 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. Mogul-Medium Base, One-Piece, Adapters and Extensions, Incandescent, Glazed Porcelain Lampholder, To Be Used in Porcelain Sockets Only, White