Tsubaki 40-2NPTWRB ANSI Roller Chain, Double Strand, Riveted, Nickel Plated, Inch, #20 ANSI No., 1/2" Pitch, 0.312" Roller Diameter, 0.312" Roller Width, 10ft Length ANSI double-strand roller chain for use in wet environments Nickel-plated carbon steel components are corrosion resistant and have an operating temperature range of 14 to 302 degrees F Ring coined link plate, grooved bushings, shot peened parts, and pre-lubricated for less initial chain adjustment Meets ANSI B29.1 standard and is Restriction of Hazardous Substances (RoHS) compliant Includes one connecting link for every 10 of chain