PetSafe Magnetic Collar Key & CollarThe little mouse that holds the key to your home and freedom for your cat. Included is a 3/8" X (up to) 9.5" adjustable collar. Magnetic collar keys are worn by your cat and unlock the PetSafe Magnetic Cat Flap, allowing your cat, and only your cat, to come and go. Pick up an extra collar and magnetic key pack for multiple cat households or if your magnetic key is lost.
