Material of This Dog Collar: Pure 18K gold over the 316L stainless steel chain, and gold is 20X thicker than other regular plated chain. High strength and hardness, heavy, durable, no rust, no tarnished for years of use! We designed a special snap buckle on the double chain for your dog, please check the details showing in the picture. It is easy to lock and unlock the clasp, but it is very strong that can’t be pull it apart even with 700lbs of force! Collar Sizing and Fit: Double Chain wide of 20MM(0.79”), Length of 14" to 26", Please note that this chain is NOT adjustable, please measure around your dog’s neck with string or tape where you want the collar to lay, and then add about 1-2inches. Who Need this Chain Collar: Do you have a chewy dog? If yes, this collar is perfect! The luxurious cuban link chain collar looks cool on both boy and girl dogs. 20MM wide, and 14inch to 26inch, it is for large dogs like Rottweiler, Pitbull, American Bully, German Shepherd, Husky, Newfoundland, Belgian Malinois, Pitsky Saint Bernard, English Bull and so on.