What this dog collar is made of - Black 316L stainless steel chain with a black plating that is 20x thicker than typical gold plating. High strength and hardness, heavy and durable, rust and tarnish resistant for years of use. Snap buckle and security - Features a unique snap buckle that is easy to lock and unlock and very strong, so it cannot be pulled apart even under about 700 lbs of force. Collar sizing and fit - Chain width: 19 mm (0.75 in) - Available lengths: 15 to 26 inches - This collar is not adjustable. To fit, measure around your dog’s neck where the collar will lay, then add about 1-2 inches. Who needs this collar - Ideal for chewers. The luxurious Cuban link style looks good on both male and female dogs. - 19 mm wide, 15-26 inches long - Designed for large active breeds that can handle rough wear, including Rottweilers, Pitbulls, American Bulldogs, German Shepherds, Huskies, Newfoundlands, Belgian Malinois, Saint Bernards, and English Bulldogs. Use scenarios - Daily wear for dogs that chew - Outdoor activities and training with large breeds - Show or stylish option for bold, active dogs