12x24x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack DUCTWORK Made from BPA and lead-free

Made from BPA and lead-free plastic

Grow environments require high-capacity

Quickly and consistently measure moisture

When used alone as an amendment

It also has a specially designed recessed drain that allows it to be highly protected and gives the ability to easily tip the unit for draining

12x24x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 1 Pack DUCTWORK Made from BPA and lead-freeNordic Pure 12x24x4 MERV 8 Pleated 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