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. and safe: The Outdoor Duct Insulation Bag is made of thick and materials. The bottom is made of strong Buckle to prevent it from being blown away by the wind. The 2 pure copper grommets are 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-freezing 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 prevent the pipes from freezing, saving money. Satisfaction : Freeze protection for outdoor plumbing valve enclosures, irrigation enclosures, well pipe enclosures or sprinkler valve enclosures in winter. size: A-50.80 x 40.64 cm Material: nylon colour: B-brown Package Contents: 1 x insulation cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.