Heavy Duty Reflective Safety Dog Puppy Collar with Locking Clasp by Prime Pet Source Prime Pet Source Heavy Duty Reflective Safety Collar stays in place and is durable to provide for lasting wear Comfortable and long lasting, can fit neck sizes from 15.7-25.9" around, suitable for medium sized breeds Easy plastic clasps allow for quick and simple attachment, while red locking device ensure this collar will stay with your dog Perfect collar for everyday use