Hadco Aluminium Shroud with Lens For Hadco B4-A, B4-G, B4-HAccessory used in the following product(s): B4 A, B4 G, B4 H. Die cast aluminum. Glass lens. Thermoset polyester powder coat paint. The Ice Blue Lens from HADCO is specially designed for use with halogen and modern Metal Halide to more closely replicate a Mercury Vapor light source. The ice blue lens will work to filter out the yellows and reds while accentuating the greens and blues. Fits Fixtures: Hadco Lighting B4 Large Aluminum Bullet Product