The only collar for training your dog. Stainless Steel Training Collar design won't rust or tarnish over time. Makes training heavy-pulling dogs simple. Size: 15 In Max Length, 2.3 Mm. Material: Chrome. Adjustable Links can be added and removed,extra links available. Color: Silver. Training Collar. Search_Phrases: Pet Collar, Pet Lead,Pet Harness,Dog Training Collar,Chain Prong Training Collar,Dog Products,Hamilton Pet Company,Hamilton Chain Prong Training Dog Collar 2.3 Mm