4", Clear, Specular Reflector Kit, Includes 4" All Pro Remodel Recessed Housing #Apert400ratsb With All Pro Clear Specular Reflectortrim With High Gloss Appliance Trim Ring #Apert403, Airtight, For Use With Non-Insulated Ceilings Or If Insulated Insulation Must Be 3" Away, 4 Remodel Clips Secure Housing & Accommodate 1/2" & 5/8" Ceiling Thickness, 5"H Fits 2" x 6" Joist Construction, Adjustable Porcelain Socket, Integral Thermal Protector, 7 Junction Box Conduit Knockouts Are Uniform 1/2" Size With True Pryout Slots, 4 Pryouts With Integral Strain Relief For Non- Metallic Sheathed Cable, 3 Push In Wire Connectors For Easier Installation, 4-1/4" Opening, 120V, Can Use The Following Bulbs 50W R20, 40W R16, 40W A19, 50W Par20, UL/CUL Listed For Damp Location.