20_1/2x25_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Cleaning Products 2 to 116 PSI and

2 to 116 PSI and water flow range is 2

Pre-coated with adhesive on both sides

This complex liquid blend of organic compounds is specifically designed for maximum effect as a plant

The numbers on the Brix scale correspond directly with plant quality

foremost being the flexibility to allow the propagator to easily select the exact concentration desired for each type of cutting

20_1/2x25_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Cleaning Products 2 to 116 PSI andNordic 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