21_1/2x23_3/8x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts - 12V Diaphragm Pump

- 12V Diaphragm Pump

Nordic Pure 18x24x4 Pleated Air Filters MERV 15 are made of electrostatically charged synthetic materials that attract and capture most airborne particulates in your home

Selectable overdose protection system

which make them suitable for plants like wheatgrass that can’t tolerate standing water VERSATILE AND REUSABLE – Trays are multi-purpose and can be used in indoor gardening

21_1/2x23_3/8x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts - 12V Diaphragm PumpNordic 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