SENQCIA Inspire Series SBR riveted Perfect Coat Plus II 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. The special coating is hexavalent chromium free and provides excellent resistance to corrosive attack in many moderately corrosive applications. Note that this particular size is rollerless and therefore a fixed bushing engages the sprocket teeth. Solid cold forged bushings extend chain wear life and greatly reduce break-in wear. Packaged chains are supplied 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.