3mm high quality Fur saver chain from Sprenger. Fur saver chain with straight, long links in copper/rosé color for dog training. The material CUROGAN is a copper-tin alloy and 100% nickel-free. It is an excellent option for dogs that are hypersensitive or allergic to regular metal chains. Due to the high copper content, Curogan chains have a brilliant reddish color that darkens with use. Copper can discolor light-colored coats. For dogs up to weight: 35 kg Size: The first measurement stated is the neck measurement / the second measurement is the total length of the chain.