23_1/2x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Monterey Lawn & Garden Products B3 is a natural and

B3 is a natural and organic alternative to synthetic fertilizers

Features 5 double shelves allowing up to 288 clones per shelf

9 x PotPro™ | Link x 2ft (unit)

For rooms up to 100

Thinnest Grodan product available

23_1/2x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Monterey Lawn & Garden Products B3 is a natural andNordic Pure Custom MERV 7 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