Thanks to the Ferplast Swing products, you can install the flap exclusively for your four-legged friend on any wooden, metal, or glass door, as well as on brick walls. The flap comes with an innovative wind stopper system that provides protection against drafts. Another important feature is the 4-way locking system, which allows you to customize the type of opening to your needs: entry only, exit only, both entry and exit, or closed. The flap has an integrated tunnel, making it suitable for installation on any structure. Opening size is 21.8 x 25.5 cm, with external dimensions of 31 x 38.4 x 9.6 cm.