PetSafe Staywell Manual 4 Way Locking Classic Cat Flap is designed to give your cat unlimited access to her home even while the human door is closed. With 4 locking settings, you can set the door to Fully Locked, In Only, Out Only, In or Out. Your pet deserves the best. Trust PetSafe to help keep your pet healthy, safe and happy. Also features an extension tunnel to accommodate extra wide walls or doors.Key Benefits No more scratched doors No more getting up late at night Lockable interior barrier with 4 locking settings Set to Fully Locked, In Only, Out Only, In or Out Fits all walls and wooden doors Maximum pet weight 7kg Tunnel included This cat flap includes an extension tunnel to accommodate for extra wide walls or doorsSystem Dimensions Frame dimensions: 223mm x 223mm x 38mm Flap opening: 135mm x 163mm Cut out size: 169mm x 169mm Glass cut out size: 210mm Diameter Maximum pet shoulder width: 163mmSystem Includes (Accessories) 1 Cat Flap 1