22x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl_hrg with recessed contacts to ensure

with recessed contacts to ensure safety during plug-in

durable plastic construction means you'll be seeing them in your garden and grow room for years

Directions for use: Use with every watering throughout the Vegetative phase and weeks 1-3 of the Flowering phase

* SunPulse lamps are also available for 600W magnetic ballasts in the various colors

22x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl_hrg with recessed contacts to ensureNordic 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