These Dog Run Throughs are a perfect agility training event for younger and more inexperienced dogs, as well as highly trained veterans to agility courses. Each one consists of a single arch, which is large enough that most breeds of dogs can easily fit underneath them. The arches are sold individually for greatest freedom of design. Any number of Dog Run Throughs can be placed in a sequence to create a tunnel of any shape. Installation is quick and easy. There are two colors of arches available, which you can select with your order. By alternating the blue and yellow arches, you can give your agility course some exciting personality, or you can choose a single color that matches the rest of your agility course. Once dogs have practiced with these arches for a while, they will be able to dart through them with surprising speed!