The Curogan Herm Sprenger 2.25mm Ultra-Plus Twin O Ring Prong Collar is the brand's most popular gauge — built for everyday training across small to medium breeds where precise, even-pressure feedback matters.
Made in Germany from precision-cast components, the 2.25mm wire pairs with the centre-plate configuration first pioneered on Herm Sprenger's Neck Tech range. The twin O ring setup gives you flexibility on the lead — clip a single ring for standard correction, or both rings together for more direct, two-point feedback in higher-distraction work.
Best suited to dogs between 7 and 18kg — Cocker Spaniels, French Bulldogs, Boston Terriers, Beagles, Cavalier King Charles Spaniels, Brittanys, Jack Russells, Border Terriers, Standard Schnauzers (smaller frame), and similarly-sized breeds.
Common use cases:
- Loose-lead walking foundations
- Heel work and obedience drills
- Reactive lead control on small to medium dogs
- Sport handling and precision work in the 7-18kg range
Please note: As with any training tool, you must condition the dog to the tool to ensure the best results. Training tools and equipment do not magically fix issues, but when introduced and conditioned properly, can improve and build strong communication between you and your dog.
We do not condone the improper use of our training prong collars. We strongly recommend seeking professional advice before utilising any training tool. To browse our list of dog trainers and behaviourists, please click here.
