20x24x2 Furnace Air Filters MERV 8 Pleated Plus Carbon 12 Pack nutrient-combo Elite 91 SILICIC ACID contains

Elite 91 SILICIC ACID contains one of the most powerful

Controls multiple fans in up to four independent zones

These disposable boot covers are ideal for non-hazardous work environments

The motor houses dual ball bearings that are rated at 67

Sold in cases of 3 for 3lb

20x24x2 Furnace Air Filters MERV 8 Pleated Plus Carbon 12 Pack nutrient-combo Elite 91 SILICIC ACID containsNordic Pure 20x24x2 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material