Staywell 980 Collar Magnetic Key 2 x 2 pack (4 spare keys) compatible with Staywell Magnetic Cat Flaps (400 & 900 Series) Replace the magnet on your cat's collar, these spare collar keys are compatible with the following magnetic cat flaps from Staywell400, 420, 440, 923, 932, 980. This replacement is compatible with the following cat flaps: Magnetic 4 Way Locking Deluxe Cat Flap (400 Series) Magnetic 4 Way Locking Classic Cat Flap (900 Series)