MAVRICPOWER Aluminum Medium Dog Door with 2 Sliding Lock Panels Doggie Door for Exterme Weahter Never Rust Pet Door for Small Dogs Up to 30 lbs

Flexible SizeThe doggie door with expanding tunnel fits paneled wood PVC and metal doors of 1 38 2 18 thick The medium dog door flap opening is 8 78W x 12 14H Strong Dog DoorOur Dog door are made out of Strong Aluminumour dog door for active dogs without worrying about breaking and bitten easily Two Magnetic FlapsMagnetic Flap of dog door designed to enable the door plate to quickly reset after being lifted as well as keep an even tighter seal when closing Double locking panelsTwo adjustable locking panels which not only lower or raise the height of your dog go through but also reduce heat transfer in rough weather and keep other unwanted visitors out of the house Easy to InstallThe dog door that provided with cutting template and steponestep installation guideand installation hardware Selftapping screw rivetetc Notice it will be better to use rivet tool for hollow door to further secure