SENQCIA Inspire Series SBR Heavy Series cottered roller chain is manufactured in accordance with the ASME/ANSI B29.1 American roller chain standard. These solid bushing/solid roller chains offer exceptional performance and long life in a wide variety of applications. The link plates of the heavy series are one size thicker than standard roller chains providing additional strength in heavy duty applications.Solid cold forged bushings 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.