Made to last a lifetime, our Super Tough pet door is made for frequent and heavy use by pets. This product is suitable for doors, walls and screens up to 55mm thick, the outer frame measures 385mm x 520mm and the durable polycarbonate flap measures 295mm x 425mm. The large frame suits larger breeds weighing up to 45kg, including Collies, Setters, Labradors, Boxers, pointers, Bulldogs, German Shepherds and more. Durable ABS Construction: Built for frequent and heavy use by pets, our super tough plastic dog door is non-corrosive and water resistant, lasting for years to come. Weather Resistant: The pet door creates a weather resistant seal that helps keeps out unwanted wind and rain from your home every time the magnetic flap snaps close. Lockable Security Clips: The locking clips can be used to control your pet's access to the indoors and outdoors. They also keep your home safe and give a peace of mind both at night and while you are away from home. Magnetic Closure: Our pet door has built in magnets which keeps the flap centred after each usage. Removable tunnel: The removable tunnel changes the thickness of the pet door, allowing it to be installed into thinner surfaces like a security screen or glass door. Specifications Model Large Super Tough Pet Door SKU 1127 White, 1123 Black Door Thickness 0mm-55mm Flap Height 425mm Flap Width 295mm Frame Height 520mm Frame Width 385mm Features Durable, Robust, Magnetic Catch, Locking Pins Parts Included Inner Door Frame, Outer Door Frame, Tunnel Partition, Screw Covers (14), 12mm Metal Screws (14), 45mm Metal Screws (14), 58mm Metal Screws (14) Materials ABS Plastic Size Guide Installation Video Guide Wooden Door Installation Screen Door Installation Glass Door Installation Written Super Tough Pet Door Installation Manual Large Super Tough Pet Door Cut Out Template