Ball Chain #10 Spool Stainless Steel 100 Feet CLEARANCE ITEM, MUST GO! #10 Stainless Steel '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); also available in #6 and #3 chain size Rustproof T304 Grade Stainless Steel Made in USA by Ball Chain Manufacturing Since 1938. We are the manufacturer, not a reseller.