Harper Trucks WB1-9 wall bracket for single cylinder safely secures cylinders. Meets insurance requirements and eliminates the hazard of loose cylinders in your workplace. Comes with a holding chain. Width is 11-Inch. Since 1940, Harper Trucks" mission has been to sell the highest quality products in the market. We have grown from a small, regional metal fabricator to the largest hand truck manufacturer in the world. As the world"s largest manufacturer of hand trucks, Harper makes one of every three such trucks sold in the United States. Harper Trucks are manufactured in a plant of 400,000 square feet with full robotic and new composite-injection capabilities.