This ULTRA-PLUS Training dog collar is the HS classic prong collar design for dog training purposes With the inclusion of an Assembly Chain, you are able to adjust your pull limitation based on the length of the chain Specifications:
Stainless Steel
2 Rings;
Classic version
Available Sizes:
2.25mm gauge/16inch length (13 inch max neck size)
3.2mm gauge/23inch length (19 inch max neck size)