20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack vacuum pump Duramax 200 greenhouse covers are

Duramax 200 greenhouse covers are graded to last 6 years under normal climate and growing conditions

Healthier plants look better

but Cultiwool is also the first to introduce the ‘donut ring’ for the retail market to even further improve water distribution

When contact occurs

Remote ballast option w/10' power cord

20x25x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack vacuum pump Duramax 200 greenhouse covers 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 20x25x4 filter