Dog Collar Chain Martingale Bulk Packs With these bulk packs you will receive assorted color adjustable dog martingale collars with chains. Great for Vets, Rescues, Groomers, Shelters and any cause for dogs. Our Martingale Dog Collars are a great alternative to traditional choke chains! These Martingale chain Dog collars work just like a choke collar. The collar tightens when a dog pulls, and relaxes when the pulling stops. Prevents dogs from backing out of their collars. Great collar for breeds with large necks and small heads like greyhounds. Choose from size Small, Medium or Large. Available in packs of 25, 50, 75, or 100. Additional Details ------------------------------ Product description: Dog Collar Chain Martingale Bulk Packs With these bulk packs you will receive assorted color adjustable dog martingale collars with chains. Great for Vets, Rescues, Groomers, Shelters and any cause for dogs. Our Martingale Dog Collars are a great alternative to traditional choke chains! These Martingale chain Dog collars work just like a choke collar. The collar tightens when a dog pulls, and relaxes when the pulling stops. Prevents dogs from backing out of their collars. Great collar for breeds with large necks and small heads like greyhounds. Choose from size Small, Medium or Large. Available in packs of 25, 50, 75, or 100.