MATERIAL: Constructed from die-formed corrosion resistant galvanized steel, no finish. ADJUSTABLE AND EFFICIENT: Its gasketed air-tight lamp housing prevents conditioned air from escaping into the attic space, reducing unnecessary HVAC energy usage, and the lamp housing compartment can be adjusted to fit ceiling thicknesses from ½ in. to 1 ¼ in. EASY INSTALLATION: Wiring is made easy with the included wiring quick-connects that allow simple installation of 12-20 AWG wire without using separate wire nuts - simply strip supply wires and push in. DIMENSIONS/BULBS: Measures 6.61 in. L x 9.4 in. W x 7.375 in. H and uses 1 BR40 light source (sold separately) 90-watt maximum. CERTIFICATIONS: cULus damp location rating makes this housing ideal for use in a variety of room settings where water may be present.