Felt Disc Wool Felt Off White Backing Type Adhesive Diameter 6 In. Thickness 1/4 In. Grade F1 Density 4 lb./sq. yd. Vibration Absorption High Abrasion Resistance Excellent Durometer 30 to 40 Shore A Tensile Strength 500 psi Hardness Extra Firm Application For Polishing Washers Pads Temp Range -80 Degrees to 200 Degrees F