Pair up your favorite Iolite trims with the dual-head design of the Iolite MLS IC Air Tight Two Head Housing from Nora Lighting. You know you're getting a rugged design with its galvanized steel construction. Engineered to perfection, the housing traps all air in its designated area, making sure the thermostat isn't working overtime. Combine the construction with your insulated ceiling and have peace of mind as it stays at just the right temperature.