Roller Chain, Chain Construction Riveted Pin, Overall Length 10 ft, Material Steel, Chain Number 40, Chain Overall Width 0.7 in, Roller Diameter 5/16 in, Tensile Strength 2,481 lbf, Pitch 1/2 in, Number of Strands 1, Pin Contruction Riveted Pin, Inside Width 0.312 in, Series Standard Riveted, Working Load Limit 648 lb, Finish Nickel Plated, Heavy Series No, Maximum Operating Temperature 150 Degrees F, Minimum Operating Temperature 10 Degrees F, Pin Hole Diameter 0.155 in WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Nickel (Metallic)