HS Sprenger Chrome Steel Training Necklace HS Sprenger Brand Training Necklace Chrome steel material ensures the preservation of the necklace for many years. This collar with rounded spikes is indicated for dogs "unaccustomed" to walking without pulling. The pressure that the spikes exerts against the animal's neck when it pulls will gradually correct its behavior. It also has a semi-hogo chain that closes at the pull. The collar has a central plate that distributes the pressure evenly. All products of the Sprenger brand are of superior quality and an unbeatable reputation. Measurements: 41 cm length - 1.5 cm width - 2.25 mm thickness - Up to 20 kg 58 cm length - 2.3 cm width - 3.2 mm thickness - Up to 40 kg 63 cm length - 2.5 cm width - 4 mm thickness - Up to 70 kg