Introducing the 3M Filtrete 4-Inch Micro Allergen Defense MPR1000 Air Filter, designed to improve indoor air quality and keep your home clean. With a MERV rating of 11, this filter is perfect for capturing even the smallest particles of dust, pollen, and other allergens.

This brand new filter is 16x25x4 inches in size and has a filter life of 12 months. The filter frame is made of paper and plastic and has features like mold resistance. It is suitable for use in air purifiers and furnaces. This product is manufactured in Mexico and comes with one unit per pack.