17_3/8x35x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl_dakine420 The stainless steel knife and

The stainless steel knife and hoe blades can be sharpened as needed to maintain cutting performance over time

(It is NOT recommended to foliar spray Kelp during bloom/flowering stages

Bio-NRG Bloom-C should not be used in drip systems or with undiluted lime

Superior color quality

17_3/8x35x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack spl_dakine420 The stainless steel knife andNordic 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