SENQCIA Inspire Series SBR riveted roller chain is manufactured in accordance with the ASME/ANSI B29.1 American roller chain standard. These chains offer exceptional performance and long life in a wide variety of applications. Note that this particular size is rollerless and therefore a fixed bushing engages the sprocket teeth. Chain pins are produced from a special boron steel to improve strength. Solid cold forged bushings and a patented pin treatment extend chain wear life and greatly reduce break-in wear. Packaged chains are pre-lubricated with high quality wax-type grease and come with a necessary connecting link to join the ends. Offset links (used to shorten or lengthen a chain strand by 1 pitch) are also available and sold separately. This chain is packaged in a 10ft box.