Halo, 6", Shallow Recessed Housing, For 2" x 6" Construction, Thermal Protector, Adjustable Socket Plate For Different Lamp Sizes, Junction Box Has 7-1/2" Knockouts, 4 Non-Metallic Pryouts, 6-1/2" Ceiling Opening, Captive Bar Hangers Span 24" Joist, Rated For 90 Degrees Celsius, #12 AWG Supply Wire, UL Listed For Damp Location & Through Branch Circuitry, Actual Size 5-1/2"H, 6-1/2" Opening, IP Rated, IBEW Labeled.