It was installed on an old/conventional wooden door and it seems to do its job very well, without being noisy when opening and closing. Despite daily wear and tear, it has proven to be durable. Judging by its width and the tight fit on my door, it probably won't fit security doors.

Cheap and effective. Be careful with the dimensions because my door was a bit wider and it fit VERY tightly. For the price, perfect.

I ordered black, it came gray; other than that, it looks like it does in the picture, but I went through the process of ordering it for the color and the size, and they sent what they had.

Another product was shown in the photo and a different one was sent. I decided to use it to avoid the hassle of returning it, and it broke in half. Wasted money

I gave it one star because it ripped in a relatively short period of time after I bought it, and it's a shame because it had exactly the length I was looking for. Maybe the cats in my area caused the product to end up like this, but that's not certain...

I am writing a review solely based on the comments I read that it is not durable and tears easily. It is logical for it to tear if your door has a minimal gap at the bottom. If there is a minimal gap, you should lift it slightly with another person while you pass the doorstop.
We have had them on all our doors for almost 2 years and they haven't had any issues.

It is not suitable for a security door. It cannot fit through unless the gap is unrealistically large. It tears very easily. Money wasted.

The product does not work for a reinforced door as stated. It has a thickness of 8cm. It is better to choose another product with a greater thickness (10cm) for a reinforced door. In terms of quality, it was not durable at all as I was trying to fit it under the door. For a door of smaller thickness, it would be fine for its price.

Ideal for my front door. Before you purchase it, make sure to measure your door because it doesn't fit for very thick doors