Plaster Frame:Architectural quality 0.050 galvanized steel ring riveted to elevated 0.064 steel junction box and ballast tray. * Clearance:Non-IC frame-ins require a minimum clearance of 3" around from thermal insulation and 1/2" from combustible material from above the fixture. * Socket Cup:Die-cast formed galvanized steel with one 4-pin socket. The socket cup attaches to the finishing trim with two present screws that allow for minor rotation within two keyhole slots.