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 features a strong buckle to prevent it from being blown by the wind. Two pure copper grommets are corrosion resistant and can be secured with a chain for added security and theft prevention. Year-round protection: The insulating cover withstands harsh conditions such as sun, strong winds, heavy rain, and snow. Prepare for winter with this sprinkler backflow cover. Insulated and waterproof: The cover provides protection against sub-freezing temperatures, wind, rust, and water. Thickened insulation cotton retains warmth and resists moisture. The exterior waterproof Oxford fabric keeps contents dry. Helps prevent pipes from freezing, potentially saving on repair costs. Satisfaction: Provides freeze protection for outdoor plumbing valve enclosures, irrigation enclosures, well pipe enclosures, and sprinkler valve enclosures during winter. Size: 50.80 x 40.64 cm Material: Nylon Color: Brown Package contents: 1 x Insulation cover Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement allowance is +/- 1-3 cm.