Herm Sprenger Ultra-Plus Prong Dog Training Collar, Chrome, 3.25 Mm X 20” Neck Size; 22” Chain Length

To adjust size, add or remove individual links

Center plate construction and symmetrical prongs provide natural contact for optimal communication

Features solid fastener plate, providing a more secure connection

Directions: To determine collar size needed, add 4” to the circumference of your dog’s neck; collar should sit higher up on the neck