30" black gunmetal plated stainless steel ball chain, 2.4mm wide. Our semi-finished ball chain necklaces are made in the USA and include a ball-chain clasp on one end. Use the full 30 inches or cut the chain to your desired necklace length. Simply slip the clasp onto the other end to finish your necklace. Black gunmetal ball chain is a popular option for making simple custom necklaces that display personalized charms (like letter charms and symbol charms expressing your personality).