Leviton 29816-C2 One-Piece Glazed Porcelain Outlet Box Mount, Incandescent Lampholder, White Perfect for closets, basements, Utility rooms 2 Terminal Screws, 6" Pigtail Leads Fits 3-1/4" or 4" Outlet Boxes Construction: One-Piece CSA Certified: File LR-1863