This model is our Economic 20’ Heavy Duty Agility Tunnels, these tunnel have a 4” pitch between wires that is required for competition. The tunnel expands up to 20 feet and the 24-inch opening meeting AKC specifications. With proper care and storage, this tunnel will hold up for years. Each Tunnel comes with 2 sets of 10" sand bag tie downs. Also comes equipped with straps to tie the tunnel together for transport and storage. The straps fold around the tunnel to avoid any mishaps when training is being preformed. Also included in the sand tie down bags are durable plastic sand management bags. This will help avoid messes with sand. Sand not included.   There is a suggestion of using the tunnel, which is better for the dogs weight is not over 30lbs.  If you have a dog is weight higher than that or you use for dog training business, we recommend you to order a SHD - super heavy duty tunnel, which will be much stronger to bare more weight and the fastest speed dogs even with sharp claws.