General description This waterproof cat flap features a 4-way rotating lock, allowing you to control your pet's access with ease. The locking mechanism can be set to entry only, exit only, free entry and exit, or completely locked, providing flexibility for your pet's movements. Technical specifications Inner size: 15 x 15.5 cm Outer size: 22 x 19 x 5.5 cm Suitable for cats with a waist circumference of less than 40 cm Installation Includes step-by-step installation instructions in the manual and an overview video Comes with 2 packs of 8 screws (short and long) for secure installation Depth of the tunnel can be adjusted based on installation needs Can be installed on various surfaces including interior doors, exterior doors, walls, windows, cupboards, and glass panes Usage Knob style lock is rotatable in 4 directions for easy access control Weatherproof brush strip reduces noise and prevents rain, wind, and insects from entering Other information