●Secure Lock: Ensure home security, control pet access, close the passage at night, and prevent external factors from entering ●Durable Steel Frame: Our pet door features a sturdy steel frame that crafted using a metal laser welding process and high-quality steel aluminum alloy oxidation to ensure durability, security, and thermal insulation. ●Easy Installation: Installing this pet door in your interior and exterior wall is a breeze with our step-by-step instructions and cut-out template, hardware.The telescoping tunnel allows for adjustable depth to accommodate different wall thicknesses. ●Energy-Efficient: The double-flap design offers weatherproofing and energy efficiency, helping to shield against extreme weather conditions and drafts. Made from food-grade silicone, chew-resistant and safe, and free from Mosquitoes and Other Small Animal Intrusion. ●Suitable for All Pets: Whether you have a small dog or a large cat, this pet door is suitable for pets of various sizes. ●TBCPET After-sales Guarantee: Customer satisfaction is our pride. We are committed to providing customers with high-quality products and excellent after-sales service. Your pet will adore this door.