The construction of the pleats in the filters is quite poor. Some are glued very close together others are far apart. Equal spacing is what they should be to get the most filter area & make the filter efficient. I'm disappointed in the poor construction quality of these USA made filters. Filterbuy please look at your quality control on the FC40R1011 filters. It's not up to your standards. The purchase process & shipping was quick which was great.
Thank you for refunding my money for the purchase I made. We had to get a new system and these didnt fit. We are installing a new system in a few weeks and will purchase ALL of our filters from you. You are a great company!