16_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake Includes Wall Adapter | Dims

Includes Wall Adapter | Dims

No Dyes (Why do others add dyes

Formulas are sediment free and are compatible with all dosing and irrigation systems in including fine dripper heads

That means frequent turning

16_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Grow1 5' Steel Stake Includes Wall Adapter | DimsNordic Pure Custom MERV 10 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