The filters I teceived were the correct suze, however the quality of Construction was poor.. It looked like you sent me your seconds. I assume they will work as intended, however for Merv 11 veru poor looking (sloppy)
I bought 14x17.5x2M11A for my daughters furnace. Because they are so hard to find. I havent given them to her yet, but I am sure they will be fine. This is my second time buying them from you.