This chain is 8 inches (20.3cm) long and is designed as additional optional security feature for an Ultra pet tag. Note, this product does not include the quick link. Using this chain, with the ends secured by the quick link (and sealed with threadlock fluid), will prevent the tag dropping off the collar in the case that the collar ring (the ring that is part of the collar) fails. If the collar ring fails then this chain will keep the tag attached to the collar.
It must be fitted at the same time as the steel quick link. It should be fed through the collar ring and the ends joined by the quick link. The link should then be screwed closed after the threads have been sealed with thread lock fluid. Made from strong, welded stainless steel links. Non-rusting.