20x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack soil The bags have pre-punched holes

The bags have pre-punched holes for easy draining and stand upright when filled with media

Lightweight yet strong powder-coated aluminum hardware

Microbial Soil Inoculant has been specifically formulated to enhance nutrient uptake in ornamentals

You can access the data via the cloud from a remote mobile device or computer to check these critical parameters are hitting the mark for crop success

an integrated temperature sensor

20x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack soil The bags have pre-punched holesNordic Pure Custom MERV 12 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