16x16x1, Filtrete Air Filter, MERV 11, by 3m (Pack of 6) MPR (Microparticle Performance Rating)&lrm;: 500 Thickness&lrm;: 1" Attracts and captures large particles like lint, household dust, dust mite debris and mold spores, from the air passing through the filter Outperforms fiberglass, washable and non-electrostatic 3-month pleated 1" filters Ideal for high velocity heating/cooling systems