3-Flaps Insulated Dog Door for Wall, Rust Proof Aluminum Alloy Medium Doggy Door, Heavy Duty Pet Door with Dual Lock, Extreme Weather Doggie Door for Interior Exterior Wall, Pets Up to 45LB

3 Flaps & Super SealingOn the basis of the original double flap with superb insulation and sealing, we have added a new thermal insulation layer design, adoption of new insulation materials, which brings stronger thermal insulation, sealing effect, and better isolation of cold & hot air from entering. In addition, with the fur strips on the side and the super strong magnet on the bottom, it can achieve better adsorption and isolation of dust, wind and insects. | Medium Pet DoorOur premium medium-sized dog door features expandable channels that fit walls from 3.95 to 7.5 inches thick. The flap opening measures 8.4 x 14.4 inches, perfect for small-sized animals weighing up to 45 pounds. Please carefully review the size chart and confirm if the size is suitable before purchasing. | All-Aluminum AlloyThe whole dog door is made of full high-quality aluminum alloy, reinforced by a higher-end welding process to make it more solid. Compared to common plastic, iron, or non-pure aluminum alloy pet doors on the market, this one is significantly more durable and bend-resistant. Aluminum is not only lighter than iron but also inherently rust-resistant, and it prevents paint from peeling! | Closing Panel & 2 LocksThe VOSOIR pog door is equipped with a closing panel to lock the pet door closed when not in use, and both sides are equipped with aluminum locks for locking the closing panel. The panel can not be opened from the outside when it is locked from the inside, which will not reduce the burglary resistance of the house. | Easy to InstallOur pet door is suitable for mounting on all kinds of indoor and outdoor walls; the installation process is simple and easy. We include screws, instructions, cutting templates, and more. Simply follow the installation steps or videos to install the dog door! | Premium ServiceVOSOIR doggy and cat doors are committed to providing every pet with a life of freedom, fun, and safety! If your dog door flap is damaged by a dog during use, we can replace it with a new one for you. This can greatly reduce the maintenance cost of the dog door.