This silver 16 18 inch extender box chain is set in sterling silver creating quality you feel as well as see at a fantastic price description of product sterling silver extender box chain 16 18 in length our range of chains and bracelets encompasses all the needs of the modern market place that is style sophistication and most of all quality at a very reasonable price variations in size and syle of all of our chains can be sourced upon request if the chain you require doesnt appear