17_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_hw which may be separated out

which may be separated out to preferred lengths

spray at 7 day intervals

Use Ancient Amber in potting soil or hydroponics with any nutrient line

such as controlled environments or cleanrooms

space-saving format — expand to full 5″ × 5″ × 5″ with just water

17_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_hw which may be separated outNordic 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