20x25x4 (3 5/8) Pleated MERV 7 Air Filters 2 Pack CO2 Made to fit comfortably in

Made to fit comfortably in your hand for on-the-go testing

For knock down foliar spray 2 oz per gallon every 2-3 days until desired results

inner diameter hose size

Rated for damp/wet conditions and offering industry-leading thermal management

20x25x4 (3 5/8) Pleated MERV 7 Air Filters 2 Pack CO2 Made to fit comfortably inImportant 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