Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 8 Pleated Plus Carbon 4 Pack chillers-heaters-and-purification & the wishbone spring is

& the wishbone spring is sturdy for easy bypass pruning

providing multiple sources of nitrogen to discourage burning as well as working together with the microbes to ensure a balanced release cycle and a diverse profile of micronutrients

Nordic Pure 10x24x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

Audible alarm for low/high CO2 levels

* Overload protection

Air Bear 20x25x5 (4 7/8) Air Filter Replacement MERV 8 Pleated Plus Carbon 4 Pack chillers-heaters-and-purification & the wishbone spring isImportant 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. We also carry 4 3 8 and 5 1 4 inch depth filters,