Educator Quick Snap Bungee Dog Collar, Biothane, Waterproof, Odorproof, Easy Connect and Disconnect Clasp and D Ring with Comfort Bungee Loop, Adjustable for Custom Fit, 1-Inch, Black1" wide collar fits all Educator 800 and 1200 series training collar receivers; all other models require 3 4" wide collar 33 inch collar for large dogs 20 pounds and up with neck diameter between 6 and 22 inches; can be trimmed to custom length High quality Biothane material provides unmatched durability and will not fray, is waterproof and odorproof, easy to clean, perfect for outdoors and active dogs Your complete satisfaction is our only concern;