Bulk Wholesale Nylon Martingale Collars - Assorted Colors Our Nylon Martingale Dog Collars are a great alternative to traditional choke chains! These all nylon collars work just like a choke collar but are gentler to dogs' throats. They tighten when a dog pulls and relax when a dog stops pulling. Buying bulk is perfect for shelters, rescues, vets, or to donate them! Available in packs of 25, 50, 75, or 100 in all sizes! Additional Details ------------------------------ Product description: Bulk Wholesale Nylon Martingale Collars - Assorted Colors Our Nylon Martingale Dog Collars are a great alternative to traditional choke chains! These all nylon collars work just like a choke collar but are gentler to dogs' throats. They tighten when a dog pulls and relax when a dog stops pulling. Buying bulk is perfect for shelters, rescues, vets, or to donate them! Available in packs of 25, 50, 75, or 100 in all sizes!