3M Filtrete 24x24x1 Air Filter MPR 1000, Allergen Defense, 6-Pack

3M Filtrete 24x24x1 Air Filter MPR 1000, Allergen Defense, 6-Pack I think these are MERV 10 but can't remember. Filters are new but have been in storage. The packaging is a little dusty and has a few tears in the corners but is still intact. Five of the filters are in a bundle and 1 is loose. The loose one has slight moisture marks along the edge but is still functional. They may have a few marks on them and the frames are rumpled on some of them. We bought these for our heater and then it went out and we had to replace the unit. The new unit was a different size. Our old unit was an AC and a heater. From experience, these are especially good for dust and pet dander. Supposed to last for 3 months but we changed ours every month to help with efficiency.