16_1/4x21_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack soil nutruient 10 boxes in a case

10 boxes in a case

This immobilizes them and starts to suffocate the mites by blocking the tracheae

Adds mechanical strength to stems

and food-safe aluminum platens

We have created the ideal indoor gardening environment inside of our hydroponic cloner

16_1/4x21_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack soil nutruient 10 boxes in a caseNordic 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