Austin Air "it" Filter Containment Berms with oversized 3/8" hole

with oversized 3/8" hole

Beyond that

All-weather corrosion-resistance

but if you handle rebar and concrete blocks all day

STAGE 1 – Large Particle Pre-filter

Austin Air "it" Filter Containment Berms with oversized 3/8" holeAustin Air "it" Filter effectively captures 99% of airborne particles 0. 1 microns and larger, including dust, pollen, pet dander, bacteria, viruses, and allergens. And it's also available with a VOC Wrap to adsorb chemicals, gases, and VOCs. This Filter works with the Austin "it" air purifier. Recommended for: Dust, Pollen, Pet Dander, Bacteria, Viruses, and Allergens. Optional VOC Wrap to absorb Chemical Gases, and VOCs Key Features: Made of durable