Polyester Blend Fits double 20/5 gallon tanks (Model 2) Three-year limited warranty Water-resistant vinyl fabrics and a soft, non-scratch backing offer long-lasting protection against dirt, grease, rust, and the elements, including the rain and sun Board insert offers additional stiffness across the top of double tanks Zip-open front allows fast access to valves; sized to fit all popular LP tanks PROTECT YOUR RV INVESTMENT: Looking for more ways to protect your RV? Classic Accessories offers a wide range of RV covers, from travel trailers to campers to R-Pod trailers and more.