The bronze and gunmetal chains are made in solid brass with a durable non- tarnishing plated finish in your choice of burnished bronze or black gunmetal. The silver chain is made of polished stainless steel. These heavy duty chains are a full 3mm thick with every link soldered closed for incredible strength. The heavy duty lobster clasp is the best I could find and matches the chain perfectly. The chain is available in one inch increments in any length you wish from 15" up to 32" long.