The Petsafe Staywell 300/400/500 Series Replacement Flap can be used to replace the flap in your Staywell Deluxe 4-Way Locking, Magnetic, or Infrared Cat Flap. This is a rigid, frosted plastic flap. Compatible with the Staywell Deluxe Manual 4-Way Locking Cat Flap (300 Series), the Staywell Deluxe Magnetic Cat Flap (400 Series), and the Staywell Deluxe Infra-red Cat Flap (500 Series). Trust PetSafe to keep your pet healthy, safe, and happy.