The glass tubes are supported by a black finished metal grid. The Billiards Premium Junior Neon Sign measures 24 inches by 8 inches and features beautiful bright green, red and blue glass neon tubes. The sign can be hung against a wall or window; they can even sit on a shelf. Neon signs have a warm mesmerizing glow, and are powered by industrial strength transformers, which operate silently and more efficiently than incandescent bulbs. All you do is hang it up and plug it in – no assembly or special wiring required. Give your home the fun and fabulous glow of real neon! For Indoor use only.