17_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack lighting_accessories blades lock closed with a

blades lock closed with a safety hook when not in use

The sidewalls on these versatile hydroponic grow trays are 2

Powerful but portable

flow (flood & drain) systems work by pumping nutrient solution up from a reservoir to a controlled water level tray

• DIMENSIONS: 14 x 18 x 2

17_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack lighting_accessories blades lock closed with aNordic Pure Custom MERV 10 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