The comfort version with ring and swivel offers the highest flexibility between dog collar and leash due to the swivel. Equipped with center-plate and assembly chain, it is a classic option for dog training. Herm Sprenger is one of the leading manufacturers of dog training products, best-known for their quality, reliability, and safety. All products are made in Germany, utilizing only the finest materials and components. Through their continuous quality control efforts over the past 140 years, Herm Sprenger’s training collars are recognized as one of the best training collars sold on the market today. Product Details • Chrome plated prong dog training collar • Distributes correction pressure evenly around the dog’s neck. • Sizes Available: Gauge 2.25mm x 16"(41cm) Gauge 3mm x 21" (55cm) Gauge 3.2mm x 23" (58cm) Gauge 4mm x 25" (63cm) • Links may be added or removed for proper fit. Additional links sold separately