MATERIAL - 18K gold vacuum plating over the 316L stainless steel chain, and gold is 20X thicker than other regular plated chains. High strength and hardness, heavy, durable, no rust, no tarnished for years of use! We designed a unique, attractive buckle. It is easy to lock& open and is very strong so that it can't be pulled apart even with 700lbs of force. SIZE AND FIT - Chain width of 13MM to 19MM(0.51”~0.75 “), length of 10" to 24"; please note that this chain is NOT adjustable, measure around your dog’s neck with string or tape where you want the collar to lay, and then add about 1/2-2inches. HIGH QUALITY - The link is strong and heavy because it is not hollow. The high polishing process makes the surface bright, smooth, Chew Proof,and comfortable. The welded stainless steel D-ring is used to connect the tag and the dog strap. It is very strong and there is no need to worry about damage. SUITABLE - This metal chain collar is suitable for Small, Medium, Large dogs like Rottweiler, Pitbull, American Bully, German Shepherd, Husky, Newfoundland, Belgian Malinois, Pitsky Saint Bernard, English Bull, and so on. GREAT GIFT - If your dog frequently chews through or breaks chains, this collar will be the best gift for him. The luxurious Cuban link chain collar looks cool on both boy and girl dogs.