23_3/4x23_3/4x1Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack grow-systems-trays-reservoirs • Dual mode of action:

• Dual mode of action: bactericide and fungicide

"Just Coir"

In addition to these benefits

An engineered hydrophilic foam cutting propagation medium specifically designed for optimal callus and rapid root development

Duct Size: 10” | Dimensions: 11

23_3/4x23_3/4x1Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack grow-systems-trays-reservoirs • Dual mode of action:Nordic 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