Roller Chain, Chain Construction Riveted Pin, Overall Length 50 ft, Material Steel, Chain Number 40, Chain Overall Width 0.654 in, Roller Diameter 5/16 in, Tensile Strength 3,900 lbf, Pitch 1/2 in, Application Power Transmission, Number of Strands 1, Pin Contruction Riveted Pin, Pitch Type Single Pitch, Inside Width 0.309 in, Series Standard Riveted, Features High Strength, Long Life, Heavy Series No, Includes (2) Connecting Links, Lubrication Light Oil Preservative