Endura Flap E2 Double Flap Pet Door for Door Installations | Stylish for Interior & Exterior Doors | Durable Aluminum Frame & Weatherproof Dual-Layer Flap | White, Large, Double Flap

DURABLE & WEATHER RESISTANT: the Endura Flap E2 double flap pet door is designed with a high-quality aluminum frame and an insulated flap that remains flexible in extreme temperatures, providing excellent weather resistance and energy efficiency for your home; large flap measure 10" x 18" and is suitable for pets up to 27" tall VERSATILE INSTALLATION: our pet door is suitable for a wide range of doors, including solid core, hollow core, metal, and storm doors, and is available in four sizes to accommodate pets of all sizes; pet door is designed to fit doors between 1-3/4" to 2-1/4" thick EASY INSTALLATION & SECURE LOCKING: The pet door comes with easy-to-follow instructions and a heavy-duty locking cover, strong as 1/16" steel sheet, ensuring secure closure when not in use; ideal for interior and exterior door installations ADAPTABLE TO YOUR PET'S NEEDS: the three-sided magnet design of the Endura Flap pet door is adjustable for training timid pets, while providing the strength you need to keep the wind out flaps are rated to stay shut in gusts of up to 50 mph BUILT FOR LIFE: our pet doors are manufactured in the USA with quality construction and backed by a lifetime warranty; invest in a reliable, long-lasting pet door that will serve your pet's needs for years to come