The Swing 3B 4-way manual cat flap from Ferplast is a pet door devoted exclusively to your four-legged friend. You can install it easily in any wooden, metal or glass door and in brick walls! A good pet flap is always a must on the condition that you have pets and you want to give them opportunities to walk in and out of your house freely and independently. Thanks to its 4-way locking system, this flap allows you to adjust the type of opening according to your needs, whether entry only, exit only, entry and exit, or closed. This model comes with a partial tunnel. Simultaneously, a new modular extension tunnel is also available as an accessory which is 5 cm in depth (screws are not included). Please note that before installing in glass structures, we recommend you to consult a glazier, as it is not possible to drill holes in toughened safety glass or double-glazing unless they were previously created during manufacture.