Condition: New Material: made of high quality stainless steel and chrome plated, for durability and resistance to rust， heavy duty chain links, strong enough for big aggressive canine dogs. Size：3.0mm diameter link x 16.0" inch length; Measure dog's neck girth and add 2~3 inches for initial collar length for Adjustment (Ex: 16.0" length collar is applicable for max neck girth 14.0") Lustrous and Strong: rust-proof chrome plated steel with silver shine make your dog looks so cool and stand out, high quality material and high-level handmade ensure this choke collar will not tarnish or break. Safe and effective: smooth rounded edges for superior comfort, thick chrome plated steel to prevent skin puncture and increase product durability, gentle to firm pull allows this collar controll your dog‘s behavior easily, great ideal for gentle effective correction. Application: perfect tools for pet training. Corrects bad dog behavior, fixes leash pulling, and helps teach responsive walking habits, recommended for professional dog obedience training or walking, great for aggressive cabine breed like Pit Bull German Shepherd Staffordshire Terrier and etc.