The filters are not very sturdy and thin cardboard bent easily during installation compared to the previous filters I have bought of this size. Just installed, so cannot say anything yet on effectiveness. Price was good so bought multiple, hope they perform as expected.
I have 8 Urgent Cares in Western North Carolina to maintain, Filter Buy ships them directly to my office , has them in stock, has a quick delivery time and has the best prices. They are now my preferred source for filters.