1mm Silver Plated Brass Dot-Dash Ball Chain. Electroplated and nickel free! Dot-Dash-Ball chain is designed to send a message. Inspired by Morse Code messages the slightly elongated link is a pleasant and subtle difference when compared to a standard ball chain. This chain works perfectly with our 1.5mm ball chain connectors. Sold by the foot (12 inches). This chain is made from solid brass and plated nickel free. Chain lengths of under three feet cannot be returned.