Herm Sprenger Black Stainless Steel Prong Dog Training Collar with Swivel. Due to its long links, this collar is especially recommended for breeds with long and fine fur. 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 • Black Stainless Steel long link fur saver dog training collar; offering corrosion resistance, easy cleaning, and hygienic qualities Sizes Available: Gauge 3mm x 20" (50cm) Gauge 3mm x 21" (54cm) Gauge 3mm x 23" (58cm) Gauge 3mm x 24" (62cm) Gauge 3mm x 26" (66cm) Gauge 3mm x 29" (72cm) Gauge 4mm x 21" (54cm) Gauge 4mm x 23" (59cm) Gauge 4mm x 25" (63cm) Gauge 4mm x 26" (67cm)