SENQCIA Hi-Max British Standard 304 Stainless Steel riveted roller chain is manufactured in accordance with the ISO 606B International roller chain standard. They offer excellent resistance against many forms of chemical attack and operate in temperatures ranging from -250 to +750 degrees F. 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.