The certified professional training and behavior specialists at Starmark Academy developed Starmarks Pro-Training Collar to provide gentle, effective control. The Add-A-Link Extension allows you to adjust the size of the collar to create a better fit for your dog.

• Each Add-A-Link extension includes three links
• Designed to be used with the large Starmark Pro-Training Collar
• Patented humane design
• Has the appearance of a flat collar
• Helps prevent pulling and lunging behavior