21_1/2x23_3/8x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts • Processes 60-80 lbs per

• Processes 60-80 lbs per hour

By using Bio·Heaven™

The 1 hour on in between off period fools the plants that stay in vegetative growth state

Blue Mamba Extra 7 mil Nitrile XX-Large - Case of 10 boxes (100 per box)

The flanges can also be reversed to prolong the life of the filter

21_1/2x23_3/8x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts • Processes 60-80 lbs perNordic Pure Custom MERV 10 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