●Herm sprenger dog chain training collar: Wire Gauge 2.5mm thick by 16 in (40cm) overall length, Chrome-Plated Steel ●Size: This dog chain collar best fits dogs with the neck size up to 13 inches ●New design: This 2.5mm Herm Sprenger Steel Choke Collar has a toggle instead of a ring, which eliminates the need to pull the collar over the dogs head ●Caution: It is very dangerous to attach the choke chain in the wrong way. Be sure to check the [How to wear] and install correctly. When training on the leg side, train in the correct way under the instructions of the trainer ●Made in Germany: Metal collars crafted by Herm Sprenger are a symbol of quality, reliability and security, they are ideal for use in various areas of dog training and everyday life