18x25x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 24 Pack Hand Tools Calcium is a secondary nutrient

Calcium is a secondary nutrient that promotes enzyme activities and plant cell structure

- Made in North America

International power supply included

Home Gardens & Backyards – Keep outdoor entertaining and growing spaces fly-free all season

Patent Pending – On

18x25x1 Furnace Air Filters MERV 12 Pleated Plus Carbon 24 Pack Hand Tools Calcium is a secondary nutrientNordic Pure 18x25x1 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