Product: Felt Strips & Rolls Material / grade: F7 Grade Wool Felt—Adhesive Backing Size: 1 " Wide Wool content: 80% Thickness: 1/2" Color: Gray Hardness: Durometer 25A Temperature range: -80 to 200 Compression pressure: 6 Adhesive backing: Rubber Adhesive temperature: 0 to 180 Roll length (ft): 20 Tensile: 250