SENQCIA Ultra-Max 600 series Stainless Steel riveted standard roller Double Pitch chain is manufactured . They offer excellent resistance against many forms of chemical attack and possess percipitation hardened round parts for improved wear performance. 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.