16x20x4 (3 5/8) Pleated MERV 8 Air Filters 6 Pack Aeromixer Synthetic Pro Edition Small amounts of micro-particles are

Small amounts of micro-particles are occasionally visible in some conditions but will not affect mineral balance or system compatibility

slide the battery box out from its resting place in the cloth underside and turn to the on position

Only one operator required

They securely seal products with the Private Reserve Vacuum Sealers to ensure long lasting freshness

Set point adjustment (from 0 to 14 pH) and calibration procedures are easily performed with trimmers on the front panel

16x20x4 (3 5/8) Pleated MERV 8 Air Filters 6 Pack Aeromixer Synthetic Pro Edition Small amounts of micro-particles areImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 16x20x4 filter