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The sturdy Classic R21 Replacement Nylon Pet Collars are the workhorses of the Invisible Fence® Brand pet containment system. They are designed to hold your dog's electronic Computer Collar® firmly in place.
Choose from a variety of colors and sizes. Simply "loosely" measure your dog's neck - and select the appropriate size. Each size is also adjustable by 3-4 inches to ensure a good fit for your dog.
Classic R21 Nylon Pet Collar colors available are Red, Black, Royal Blue, and Pink and are 3/4" wide. All collars are punched and sealed to be compatible with your Invisible Fence® Brand Computer Collar®.
Please indicate size and color with nylon collar purchase.