The Travall tailgate guards are wire mesh and are designed to help stop your dog from bolting straight out of your car boot. They come in several sizes - 10" up to 22" wide, with a height of 18". These tailgate guards are made from mild steel with a scratch resistance coating which can be installed in about 15 minutes. They are designed to work with all Travall products and must be attached to a Travall boot divider.