The pet door is made of sturdy plastic and ABS material so that it will not deform even in extreme temperatures. Dimensions: This is a large cat flap, external dimensions: 26x26cm, suitable for installation on thin metal doors, doors and walls, the cat flap is suitable for walls with a thickness of 6cm, if the wall exceeds this thickness, there will beThe Pet Door is suitable for cats weighing less than 17 lbs (~7.7 kg) and measuring less than 23 inches (~58.4 cm). Four-way lock: The cat flap with lock has 4 switching modes. The cat flap can be adjusted by a red and green switch with a label. It can be set to open, only to extend or completely locked,and is easily adjustable so your pet can get in and out. The clear flap that most pets love, the windshield and wiper seals are sealed flaps with closures. The brush bar reduces energy loss and silent action, ensuring animalsservants and owners are not disturbed.