The COA Universal Seat Belt provides the ultimate safety solution for the car. The Universal Seat Belt allows owners to safely attach a dog's harness to the seat belt catch in your car. Your travels with your best friend have never been safer. All you need to do is to plug one end into your cars catch and hook the other end onto their harness. For safety, only to be used with a harness, not just a collar. The Universal Seat Belt is compatible with most harnesses. Adjustable from 56 - 70cm.