Leviton Keyless Medium Base White Porcelain Lamp Socket | Ivey Lumber Company
Leviton 660W Medium Base Snap-In Porcelain Incandescent Lampholder, White 8885 - The Home Depot
Leviton 30 Incandescent Lampholder, Medium Base, Two Piece Porcelain; 660W-600V; Keyless; with Two 8-32 By 1/2 Inch Long Mounting Screws. - Light Sockets - Amazon.com