9_3/4x23_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack cloning-&-seed-starting Maximizes the size

Maximizes the size

4000K color temperature

that allows cells to grow and reproduce

At 1/4" OD

Ideal air/water balance

9_3/4x23_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack cloning-&-seed-starting Maximizes the sizeNordic Pure Custom MERV 13 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