EASY ASSEMBLY: Three simple steps for installation in walls, wooden, uPVC, PVC and metal doors, as well as single and double glass windows and doors WATERPROOF AND SECURE: Thanks to the magnetic strip attached around the flap, this cat flap can be used in summer and winter and is secure thanks to the 4 types of closure DIMENSIONS: The dimensions of the PetSafe cat flap are: 23.5 x 5 x 27cm; recessed in doors and walls with a thickness of 6 cm. Maximum shoulder width 16.2 cm, cats up to 7 kg FREEDOM AND FLEXIBILITY: Maximum freedom for your cat. It will be more autonomous and the simple 4-position locking system will allow you to control its comings and goings