Replacement Pre-Filters for the Santa Fe Classic or SaniDry XP Dehumidifier. These filters are original equipment products and are intended to be used in conjunction with either a MERV 11 or carbon/odor filter. Sold in a pack of 12 filters. Also available from IAQ Living in a quantity of 4. Actual measurements are 14.75 x 18.75 x .25 inches.