Product: Felt Sheets Material / grade: F3 Grade Wool Felt—Adhesive Backing Size: 12" × 12" Wool content: 85% Thickness: 3/8" Color: Gray Hardness: Durometer 35A Temperature range: -80 to 200 Compression pressure: 13 Adhesive backing: Rubber Adhesive temperature: 0 to 180 Tensile: 400