Endura Flap E2 Single Flap Pet Door for Thick Walls | Deep Wall Design up to 15.75" Thick | Insulating Dual-Layer Flap & Durable Aluminum Frame | includes Locking Cover | White, Medium, Single Flap

ENGINEERED FOR THICK WALLS: the Endura Flap single flap pet door is specifically designed for thick walls up to 15.75" deep and provides superior insulation, keeping your home comfortable and saving on energy costs; the flexible flap material remains functional in extreme temperatures, as low as -40 degrees; medium flap measures 8" x 15" and is suitable for pets up to 22" tall

DURABLE CONSTRUCTION: built with a sturdy aluminum frame and a wood tunnel for added strength and versatility, this pet door is designed to withstand daily use by pets of all sizes; the high-quality materials and construction ensure a long-lasting solution for your pet's comings and goings

AESTHETICALLY PLEASING: available in white, black, or tan aluminum frames to match your home's décor; our new E2 design pairs a stylish modern frame construction with the established durability and performance of the Endura Flap

SECURE AND VERSATILE: includes a robust locking cover, as strong as 1/16" sheet steel, allowing you to block access when needed, providing added security for your home; triple sided magnet design in the flap allows for flexibility when training or with timid pets

LIFETIME GUARANTEE: our pet doors are proudly designed, engineered, and manufactured in the United States, with a lifetime warranty you can be certain your investment will provide years of enjoyment for you and your pets