17_1/2x23_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Chemicals The gridded surface and bright

The gridded surface and bright color allow for easy monitoring

Keep your eyes relaxed and protected with our MH grow glasses

Comes in a bottle designed to keep air and light from damaging the solution

5x5ft(veg) grow space

Keep containers tightly sealed when not in use

17_1/2x23_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Chemicals The gridded surface and brightNordic 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