Please measure before purchase : It is recommended to measure the pipe before purchasing the sprinkler valve cover and reserve 1 inch or more for the appropriate size. Durable and safe: The Outdoor Duct Insulation Bag is made of thick and durable materials. The bottom is made of strong Buckle to prevent it from being blown by the wind. The 2 pure copper grommets are corrosion resistant and the grommets can be locked by a chain to prevent theft and increase security. Year-round protection: The return insulating cover easily handles harsh conditions such as sun, strong winds, heavy rain and snow. Get ready for winter with our sprinkler return cover. Insulated and Waterproof: The return cover protects against sub-zing temperatures, wind, rust and water. Thickened insulation cotton can not only keep warm but also moisture-proof. The exterior waterproof oxford fabric keeps dry. A backflow device will prevent the pipes from zing, saving money. Satisfaction : ze protection for outdoor plumbing valve enclosures, irrigation enclosures, well pipe enclosures or sprinkler valve enclosures in winter. size: B-60.96 x 60.96cm Material: nylon colour: B-brown Package Contents: 1 x insulation cover