20x25x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 2 Pack dis HI700661 pH electrode cleaning solution

HI700661 pH electrode cleaning solution sachet for agriculture (3)

This sensor provides a rapid response and high accuracy pH measurements for industrial applications

Contains three dual-ball bearing fans with PWM-controlled motors to minimize noise

elastic closures on both ends help keep sleeves in place even with repetitive movements

Runs on a 400W HPS ballast

20x25x4 (3 5/8) Pleated Air Filters MERV 14 Plus Carbon 2 Pack dis HI700661 pH electrode cleaning solutionImportant 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 20x25x4 filter