ROK ball chain by Bico Australia. Rok is a very thin ball chain with a continuous round ball link pattern in a brushed silver matte finish. Its width of 1/16 inch will fit all Bico Australia pendants. Silver-plated with a brass core for strength and an invisible protective coating to retain the finish. Individually hand polished. Color is real silver. The chain length is adjustable by threading the chain through the clasp or it can be shortened by cutting between the links. At the longest setting the chain is 24 inches.