Ball Chain #10 Spool Brass Plated Steel 100 Feet CLEARANCE ITEM, MUST GO! #10 Yellow Brass 'B' Couplings are used as a connector for this chain size (sold separately) #10 size chain has a bead diameter of 3/16" (4.8mm) Brass plating over carbon steel; yellow brass chain also available Made in USA by Ball Chain Manufacturing Since 1938. We are the manufacturer, not a reseller.