Dogline Herm Sprenger - ULTRA-PLUS Training Collar with Center-Plate and Assembly Chain - Short Version – Black Stainless SteelThis Training Collar is designed to have a higher number of links at the same length, providing a more targeted impact on the dog. It also has a high stability due to the 3 mm wire thickness. Recommended as an alternative to the 2. 25 mm training collar for larger dogs. Features: pull limitation on the length of the assembly chain made of high quality stainless steel in a black look smaller links with larger wire thickness for even more precise impact