Introducing our revolutionary Herm Sprenger Improved Design Dog Training Collar, meticulously crafted for precise correction and pull limitation to elevate your training regimen. Featuring prongs of the same size as our 2.25mm wire gauge but with the enhanced strength of a 3mm gauge, this unique collar ensures effective training with unmatched durability. Constructed from durable Curogan, this collar is rust-resistant, yet may darken over time due to its high copper content. However, restoring its original luster is simple with metal polish, ensuring it maintains its aesthetic appeal. Enjoy a customized fit with our adjustable design, accommodating dogs with neck sizes up to 18 inches. For larger neck sizes, additional middle links are required. Please note that due to the new unique design, standard middle links are not compatible, and specific links designed for this model must be used for adjustments. Trusted by professionals worldwide, this collar is engineered to distribute pressure evenly, providing safe behavioral correction without the risk of choking. Its humane effectiveness in training has earned the trust of dog trainers and veterinarians alike. Crafted with pride in Germany by Herm Sprenger, you can trust in the highest quality and durability with every collar manufactured. Experience the precision of German craftsmanship and elevate your training sessions with confidence and reliability.