17_1/2x17_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack veg nutrients and may be used with

and may be used with both hand operated or pneumatic presses

The comfortable shoulder pads are universally compatible with 5-gallon buckets

In addition to nitrogen level increases

It is great for small size closet type home grow setups where quiet operation is essential

The unit measures 9

17_1/2x17_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack veg nutrients and may be used withNordic 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