Description: 1.This no-pull dog chain choke collar can help to correct bad dog behavior, fixes leash pulling, teach responsive walking habits. 2.Made of heavy duty 304 stainless steel, high polished makes the surface smooth and comfortable, unique design makes your dog looks so cool and stand out. 3.Length 16" is suitable for corgi, pekinese, poodle.Length 21-23" is suitable for schnauzer, japanese spitz, shepherd. Length 25" is suitable for goldens, shepherd, doberman, huskies. Specifications: Material: Made of stainless steel, high quality material against rust tarnish or break. Package includes: 1 pcs Dog Choke Collar Multiple Sizes: 2.0mm diameter link x 16.0" inch length. 3.0mm diameter link x 21.6" inch length. 3.5mm diameter link x 23.6" inch length. 4.0mm diameter link x 25.5" inch length. Kindly remind: 1. Sized by total length, including the rings. 2. Please measure pet's neck girth and add at least 2-4 Inch for adjustment, do not select size based on breed/size name. 3. It's supposed to put the chain through one of the rings, but not put one of the ring through the other. Please refer to product image on how to use this chain collar.APPLICATIONS: Dog training choke/collar is excellent for gentle control, convenient to be used for daily walking, training. Recommended for professional dog obedience training for Goldens, Shepherd, Pit Bull, Huskies etc. DOG TRAINING COLLAR: The metal choke collar tightens when your dog pulls and loosens when the behavior is corrected, perfect to correct bad dog behavior, fixes leash pulling, and helps teach responsive walking habits. DURABLE AND COMFORTABLE: Slip dog collar with high polished craftsmanship makes the surface smooth and comfortable. Heavy duty and chew proof chain links, works well for strong breeds. MATERIAL: Made of premium quality 304 stainless steel, high quality material against rust tarnish or break. Fully-welded O-ring for easy leash attaching. SIZE M: 3.0mm diameter link x 21.6 inch length. Please measure pet's neck and add at least 2-4 Inch for adjustment, then refer to size map to choose the suitable size for your dog.