Herm Sprenger Click Lock Buckle Canine Pinch Collar Made of Curogan - 1/8 inch (3.2 mm) - Size 21 inch (52 cm)

Herm Sprenger Curogan Ultra-Plus Prong Collar with Center-Plate and Click-Lock Buckle - 3.2 mm x 20 1/2 inches

Herm Sprenger - Curogan Additional Prong Links for Herm Sprenger Ultra-Plus Dog Training Collar - for Small Medium Large Dogs - Made in Germany (3.2 mm)