Die Cast Aluminum Housing with External Heat Sinks for Cooler Operating Temperatures. Powdercoat Finish Over a Chromate Conversion Coating. Includes 4" Stem. Maximum Stem Length: 30 Feet. Tempered Clear Flat Glass Lens, Acrylic Conical Lens, Acrylic Drop Lens, Polycarbonate Drop Lens. Mount with Included 3/4" Die Cast Hook.