Sprenger Curogan Prong Collar Size:3.25mm - 23" (Fits 21" Neck) with O-Rings Uses RX-120 receivers

Uses RX-120 receivers

Fitted with a heavy duty solid brass 1" bolt-snap on one end and a sewn loop on the other for the included carabiner

5" x 6" badges

Very stubborn or hard-headed dogs

Sprenger Curogan Prong Collar Size:3.25mm - 23" (Fits 21" Neck) with O-Rings Uses RX-120 receiversMade from a copper tin alloy Does not contain nickel Available in two gauges Famous Herm Sprenger quality Made in Germany [split] Herm Sprenger prong collars have long been considered the gold standard for prong collars. These collars are made in Germany from a Copper and Tin alloy that does not contain nickel. Some dogs may have an allergic reaction to nickel and Curogan collars are a good alternative for these dogs. Curogan collars will not rust but