16_1/2x21_5/8x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems HI70004G is a high quality

HI70004G is a high quality pH 4

NOTE: Not for use with fan speed controller (ACSC)

Monterey Disease Control is a preventative biofungicide/bactericide that uses the naturally occurring beneficial bacterium Bacillus amyloliquefaciens strain D747 as its active ingredient

The slim curved tip blades are razor sharp and make it possible to trim flowers and buds in the most crowded situations

blended from pure plant oils and extracts

16_1/2x21_5/8x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Hydro Systems HI70004G is a high qualityNordic Pure Custom MERV 8 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