Product review (3 stars): my fridge has stopped complaining that my air filter is bad. 3 stars is "Good enough
Mine did not have these ridges. It was a plain, flat surface which I'm sure doesn't do the job as well as the shape that is advertised here which was similar to the one that came with my fridge. Regardless, my fridge has stopped complaining that my air filter is bad. 3 stars is "Good enough."