21x23_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack nutrients These awesome kits are made

These awesome kits are made with Gorilla's high standards and easily snap into place horizontally on the frame of your Gorilla Grow Tent

This is the 1

Will fit into any size vehicle for transportation

especially with inert media and when using reverse osmosis (RO) water

21x23_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack nutrients These awesome kits are madeNordic Pure Custom MERV 12 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition