The Swing 1SB 2-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 2-way locking system, this flap allows you to adjust the type of opening according to your needs, both entry and exit. This model comes with a partial tunnel which is best suited for cats and puppies. A new modular extension tunnel is 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.