Magnetic Lock with Secure Seal:This medium pet door features a magnetic flap (8.5” x 11.5”) with a strong frame, designed for pets up to 40 lbs. The bottom magnetic strip ensures the flap stays closed when not in use, helping to block bugs, mice, and unwanted animals from entering Weatherproof & Tight Protection:Equipped with windproof and rainproof seals plus a removable flap, this pet door provides excellent insulation against harsh weather. Its sturdy construction maintains reliable performance from -40˚F cold to extreme heat, ensuring long-lasting durability Easy DIY Installation:The pet door comes with clear instructions and a cutting template for precise placement, allowing quick and simple installation. Suitable for 0.5'' to 2.25'' thick doors or walls (wood, metal, PVC). Tip: For hollow doors, fill the gap with base & spacer before installing Durable & Built to Last:Crafted from high-quality materials, this medium pet door withstands daily use without warping or cracking. Its robust frame design ensures long-term stability, making it a reliable choice for cats and dogs Four Adjustable Modes:The pet door offers four access settings: in-only, out-only, both ways, and fully locked. This multi-mode switch allows you to control your pet’s movement with ease—providing freedom while ensuring security at night

Weatherproof Plastic Dog Door with Secure Locking Panel, Durable White Pet Door 8.5"x11.5" for Large Dogs & Pets, Easy Install for Interior & Exterior Doors, Walls, Screens