17_1/8x26_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Water Treatment Features a CNC machined aluminum

Features a CNC machined aluminum frame with a modern brushed black finish

therefore it is recommended to begin feeding within 2 to 3 days after transplanting

The Grow1 ULV Electric Atomizer utilizes a high-power motor and superior design to bring high efficiency in uniform droplet size

Each air filter box is built using 1mm thick cold-rolled steel and finished with matte black powder coating

17_1/8x26_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Water Treatment Features a CNC machined aluminumNordic Pure Custom MERV 14 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