Great product and easy to install. As far as "durability" we will see, but the quality of the PVC flaps is good. The hardware is decent, though I used some longer/stronger screws to install the mounting plates vertically along the top of my rear garage door.The PVC flaps work perfectly to keep in the AC, while giving me access to the back yard and my shop. They also help keep out dirt and bugs, as well as the dog.... for now.Highly recommend.