100 foot spool of nickel plated steel ball chain, #3 size (bead diameter of 3/32" or 2.4mm). Matching #3 nickel plated brass connectors are sold separately. Ball Chain is perfect for many applications, including: dog tag chains, beaded chains, wholesale jewelry chains, badge chains, pull chain, industrial chain, vertical blind chain, retaining chain, plumbing chain, keychains, beaded lanyards, ID chain.