Nylon 6/6 has a slippery surface that reduces friction and wear. This Product is Manufactured in China. Diameter: 2"; Diameter Tolerance: (-0.000" - +0.008"); Length: 1 ft.; Length Tolerance: (-1.000" - +1.000"). Color: Off-White; Clarity: Opaque; Tensile Strength: 13,000 psi; Tensile Strength Rating: Excellent; Imact Strength: 0.6 ft.-lbs/in.; Impact Strength Rating: Poor. Coefficient of Friction: 0.25; Friction Rating: Very Slippery; Water Absorption: 0.0128; Water Absorption Rating: Poor; Density: 0.041 lbs / cu. in.. Hardness: Rockwell M85; Temperature Range: -20° to 210° F; Specifications Met: UL 94 HB.