Negative Air Machines 24" x 24" x 1/2" Pad Pre-Filter 40/Case abatement Its strength and durability make

Its strength and durability make it perfect for a wide range of indoor and outdoor applications

35mm Limited Flammability

Fits most full brim hard hats and accommodates a wide variety of face shields

including petrochemical

Negative Air Machines 24" x 24" x 1/2" Pad Pre-Filter 40/Case abatement Its strength and durability makeSKU: NA2040 Description Extend the life of your HEPA filters by using first stage polyester pre filters. These should be changed daily and dramatically increase the lifespan of your HEPA filter and your negative air machine. These filters will fit: Novatek Novair 2100 Novatek Novair 2102 Novatek Novair 2105