[Application]: This cat flap is suitable for cats or dogs under 6kg / 13lbs; Exterior size is 11.8 x 11.8 x 1.6" (W x H x D); Shutter size is 7.25'' x 8'' (W x H); Ideal for installation on a glass door or window [4 switching modes]: four independent modes can be set by the switches on both sides: exit only, entrance only, entrance and exit, and fully locked; It is easy to control your pet's entry and exit freely [Fully transparent design]: Completely transparent, perfect for your window screen and glass door, never affects the appearance; It also helps pets to see at through the door and even you can see out the window [Brush strip on the flap]: strong adhesive backing, attached on the flap, soundproof, windproof, dustproof, weatherproof, soft and safe for your pet [High quality and durable]: Made of ABS plastic, smooth and durable surface, scratch resistant. weathered, sturdy, durable; If you have any questions do not hesitate to contact us