Mercmaster III Glass Refractor Guard, Lamp Type: 50 - 150 WTT High Pressure Sodium, 100 - 250 WTT Mercury Vapor, 175 - 250 WTT Metal Halide, Material: Die-Cast Copperfree (4/10 Of 1 PCT Max) Aluminum, Mounting: 90 DEG Stanchion, Length: 11 I