SHZOND Large Dog Door Aluminum Dog Doors W/Extra-Large Flap 17.5" W x 27.7" H Doggie Doors for Large Dog Up to 220lbs

【Extra-Large Dog Door】Heavy-duty aluminum dog door adopts new flap design to better withstand windy and bad weather. Flap Opening: [14 1/5"W×24 1/2"H]. Frame: [17 1/2"W×27 2/3"H]. 【High Grade Aluminum Frame】Heavy duty double flap dog doors can be installed on all types of doors and interior walls in [1 3/16"-3 2/3"] thickness, suitable for pets under 220 lbs. 【Easy to Control & Safety】The pet door has 2 locking modes to choose from,double magnetic flaps allow your cats and dogs to enjoy free entry and exit, potty rest and playtime without your help. 【Energy-Saving】Durable new aviation aluminum alloy can be used for many years and is stronger. Equipped with 2 safety locks, safety plate and sliding lock for safety and energy efficiency. 【Easy to Installation】Dog door includes cutting template, detailed instructions, mounting hardware to make installation no more difficult. If you have any questions about dog doors, please contact us in time.