Felt Sheet General Purpose Wool Felt Backing Type Plain Thickness 3/16 In Width 24 In Length 24 In F1 Grade Off White Color Density 3 Lbs/Sq Yd Min Temp Rating -80 Deg F Max Temp 200 F Vibration Absorption High Abrasion Resistance Excellent Durometer 30 to 40 Shore A Tensile Strength 500 PSI Hardness Extra Firm For Polishing Gaskets Seals