3m filtrete 2800 mpr ultrafine particle reduction filters 16x20x1 2-pack

3m filtrete 2800 mpr ultrafine particle reduction filters 16x20x1 2-pack merv -14 rating 2800 mpr (microparticle performance rating) removes 97% of dust particles 7 times better compared to non-electrostatic pleated filters captures particles down from .3 to .1 micron