mestyl Dog Door for Wall, Pet Door, Doggie Door with Telescoping Tunnel, Double Magnetic Flaps and Sliding Lock Panels, 3-Flap Dog Door and Cat Door, Easy to Install, White, Medium

mestyl Door Medium Size‘:The dog door with the telescoping tunnel accommodates walls that are 1 3/4"- 8 1/4" in thick. Flap Opening:8 1/4" * 12 3/16", Frame: 12 3/416" * 16 15/16" ,suitable for 40lbs dogs. | Easy to Install‘:Crafted from high-quality plastic, this dog door is designed for long-lasting durability. The integrated telescoping tunnel, included cutting template, and step-by-step installation guide make setup quick and hassle-free, so you can enjoy a fully functional pet door in no time. | Weatherproof Construction‘:Featuring 3-Flap and sliding lock panels, this dog door is designed to withstand harsh weather conditions. The magnetic reinforcement at the bottom of the flaps ensures a tight seal, providing extra protection against wind, rain, and extreme temperatures.