Cotton laminated with a phenolic resin. CE is an economical choice with moderate impact strength. This Product is Manufactured in China. Thickness: 1/4"; Thickness Tolerance: (-0.005" - +0.005"); Width: 1"; Width Tolerance: (-0.03" - +0.03"); Length: 24"; Length Tolerance: (-0.25" - +0.25"). Color: Brown; Clarity: Opaque; Tensile Strength: 10,000 psi; Impact Strength Rating: Good. Impact Strength: 1.7 ft.-lbs./in.; Impact Strength Rating: Poor; Coefficient of Friction: Not Rated; Friction Rating: Not Rated; Water Absorption: 0.02; Water Absorption Rating: Poor. Hardness: Rockwell M100; Density: 0.049 lbs / cu. in.; Temperature Range: 250° F; Specifications Met: UL 94 HB.