Chainologie Antique Copper Chain _#52: 5.5x8.5mm Medium Curb Chain (Per Yard/per 3 Feet) Brand new curb chain specially manufactured for multi-chain projects using popular curb chain styles Uniform soldered links of approx. 18 gauge wire have a slight front-to-back twist so links overlap, helping the chain to lie flat Links are about 8mm long x 5.5mm wide (outside dimensions), approx. 3-3/4 links per inch. Lead-free, nickel-free brass chain is plated in the USA with VERY CLEAN Antique Copper Antique Coper plating goes with Antique Copper plated, Bright Copper plated- or Real Copper jewelry components.