Product: Felt Sheets Material / grade: F7 Grade Wool Felt—Adhesive Backing Size: 12" × 12" Wool content: 80% Thickness: 1/4" Color: Gray Hardness: Durometer 25A Temperature range: -80 to 200 Compression pressure: 6 Adhesive backing: Rubber Adhesive temperature: 0 to 180 Tensile: 250