Home Home & Garden 3M Filtrete Allergan Defense MPR 800 Micro Particle Reduction HVAC Furnace Air... Home & Garden 3M Filtrete Allergan Defense MPR 800 Micro Particle Reduction HVAC Furnace Air Filter (3-Pack, Many Sizes) $15.88 By ARCOM - 25 August 2020 62 0 SHARE Facebook Twitter Go to the deal page: 3M Filtrete Allergan Defense MPR 800 Micro Particle Reduction HVAC Furnace Air Filter (3-Pack, Many Sizes) $15.88