25x25x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 2 Pack nutrients and supplements the cap was redesigned to

the cap was redesigned to be leakproof and can be attached to the top of the meter when not being used—no more lost caps

It's made by using micronization to grind the shells into an extremely fine powder

and carbon block filters

HIGH OUTPUT Lamps: Triphosphor coated

25x25x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 2 Pack nutrients and supplements the cap was redesigned toNordic Pure 25x25x1 MERV 12 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