16x16x2 Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack fans-ventilation-ducting The sidewalls on these versatile

The sidewalls on these versatile hydroponic grow trays are 2

Outer Dimensions: 1''

Developed for use in soilless

In addition to its horticultural uses

Economy Flood Trays feature newly re-designed channels as well as dual-step sidewalls which allow for 2 different root heights

16x16x2 Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack fans-ventilation-ducting The sidewalls on these versatileNordic Pure 16x16x2 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