Ball Chain #13 Spool Nickel Plated Steel 50 Feet This is a larger more industrial size ball chain with a shiny chrome finish #13 size chain has a bead diameter of 1/4" (6.3 mm) #13 Nickel Plated Brass 'B' Couplings are used as a connector for this chain size (sold separately) Highest quality and value chain on the market Made in USA by Ball Chain Manufacturing Since 1938. We are the manufacturer, not a reseller.