Ruffwear Coupler for Dog Leash. The ultimate leash coupler has arrived! This coupler is allows for easy tangle-free walking of your pups. Made with wavelength stretch webbing this coupler absorbs shock when being stretched and makes it a comfortable walking experience for both dogs and pups. Aluminum V-ring provides secure leash attachment; end clips swivel and provide secure attachment to dogs. Hand wash with mild detergent; air dry. Sizing: Length per side: 12 in. | Stretches to 19 in.