Shape: Rod; Material: Acetal Copolymer; Grade: Standard Diameter: 4"; Diameter Tolerance: (-0.000" - +0.016"); Length: 1 ft.; Length Tolerance: (-1.000" - +1.000") Color: Black; Clarity: Opaque; Tensile Strength: 9,100 psi; Tensile Strength Rating: Good; Imact Strength: 1.1 ft.-lbs/in.; Impact Strength Rating: Poor Coefficient of Friction: 0.35; Friction Rating: Slippery; Water Absorption: 0.0022; Water Absorption Rating: Good; Density: 0.051 lbs / cu. in. Hardness: Rockwell M90; Temperature Range: -50° to 180° F; Specifications Met: UL 94 HB