ULTRA-PLUS Training Collar comes with a centre plate and assembly chain. This is the standard version with two rings for different levels of control. This product if for professional dog training only.
Gauge 3.2mm and length is 58cm this can be reduced by removing a link or increased by buying extra links.
As with any equipment used to walk or provide control to your dog, please ensure it is correctly fitted and used to ensure no discomfort is caused to the dog. If necessary seek advice from a qualified trainer.