Herm Sprenger Original NEW Metal Collar "Neck Tech", Size: 24", Stainless Steel, Life Time Warranty. - Herm Sprenger's FUN Neck-Tech design features a stainless steel collar - Each part stamped from solid coiled stock. Size - 24" - This unique design imitates pinch collar with noise and not teeth!!! - This collar is great for dog that have been using pinch collar and know the noise of it. - Nylon billets with a safety buckle.