21x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety The reels on these machines

The reels on these machines are 5” in diameter and 21″ in length

Less Transparent than 6 mil Greenhouse Plastic (More Difficult to See Through)

Garlic Barrier AG+ offers a natural

1 × Thermometer and Hygrometer

The newest addition to our Grow1 line of Dry Racks

21x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety The reels on these machinesNordic Pure Custom MERV 14 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