Our Ultra Clear Pet Door blends nicely into your home’s aesthetic. This sleek, transparent design is made for see-through glass doors, windows and screens up to 16mm thick. The pet door’s frame diameter measures 435mm while the flap measures 290mm x 290mm. Magnetic Catch: A magnetic catch means your cat flap will automatically close and stay closed when not in use. Magnets also keep the flap centred after each use. Weather Resistant: Our pet doors are made to brave the elements. They are weather resistant, meaning they'll help stop wind and rain from entering your home. 4-Way Locking: Our special 4-way locking system allows you to easy control your pet’s access to the outdoors or indoors during the night or day. Durable polycarbonate flap: Built for frequent usage, our cat flap door is UV resistant and virtually unbreakable. Specifications Model Medium Ultra Clear SKU 1159 Door Thickness 0mm-16mm Flap Height 290mm Flap Width 290mm Frame Diameter 435mm Features Durable, Robust, Magnetic Catch, 4-Way Locking Parts Included Inner Door Frame, Outer Door Frame, Screws (4), Screw Covers (4) Materials ABS Plastic Size Guide Installation Video Guide Written Ultra Clear Installation Manual Medium Ultra Clear Cut Out Template