BACK-UP is a designed for trainers that utilize multiple collars on dogs in training. The BACK-UP is constructed from 100% USA Manufactured polyester for durable use. The BACK-UP allows you to connect the short couple to a prong or martingale type collar and the longer coupler to a flat buckle, slip or backup collar. Crafted from 100% USA manufactured polyester, USA forged "O" rings and snaps and sewn. Accommodates 2 Collars and 1 Leash(not included) Available in Small: 3/8" x 6" and Large: 5/8" x 6"

Back-up coupler (large) 5/8" x 6"