16x20x4 (3 5/8) Pleated MERV 13 Air Filters 2 Pack spl_hi development and activity levels can

development and activity levels can all be reduced

Tumbler motor for Twister T2 trimmer

cast aluminum blade

Double the growing space

16x20x4 (3 5/8) Pleated MERV 13 Air Filters 2 Pack spl_hi development and activity levels canImportant 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