SENQCIA Inspire Series SBR riveted roller chain is manufactured in accordance with the ASME/ANSI B29. 4 American roller chain standard for conveyor series double pitch chains. These solid bushing/solid roller chains offer exceptional performance and long life in a wide variety of applications. Chain pins are produced from a special chrome-moly alloy steel to improve strength. Solid cold forged bushings extend chain wear life and greatly reduce break-in wear. Packaged chains are pre-lubricated with high quality rust prevent oil 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 on a 50ft reel.