This PetSafe manual cat flap Classic 917 gives your cat a free pass to enter or leave the house even when the door is shut! This PetSafe cat flap was formerly known as the Staywell pet flap. It is suitable for cats of up to 7 kg. The Staywell manual cat flap has a 4-way security lock (locked, open, in-only and out-only) and a weather-resistant flap closure for greater control of cat\'s access to your home. This cat door is easy to install with its universal fitting for windows, walls and doors up to 5.7 cm thick. A tunnel extension is included in delivery.