Glass fabric laminated with an epoxy resin. G-10 is strong, machinable, moisture resistant, and electrically insulating. This Product is Manufactured in China. Diameter: 5/8"; Diameter Tolerance: (-0.001" - +0.001"); Length: 2 ft.; Length Tolerance: Oversized. Color: Yellow; Tensile Strength: 40,000 psi; Tensile Strength Rating: Excellent; Impact Strength: 14.0 ft. - lbs./in.; Impact Strength Rating: Excellent. Coefficient of Friction: Not Rated; Friction Rating: Not Rated; Water Absorption: 0.0015; Water Absorption Rating: Good; Hardness: Rockwell M110. Density: 0.065 lbs / cu. in.; Temperature Range: 270° F; Specifications Met: UL 94 HB.