16x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 1 Pack new-releases We’ve taken cutting edge technology

We’ve taken cutting edge technology to design a ballast that runs efficiently and a reflector delivers maximum uniformity — making this CMH grow light more efficient than ever

Weight: 47 lbs

The ILUMINAR single-ended 315W CMH lamps are perfect for propagation

DO NOT MIX WITH pH DOWN - AND YOU MUST ALWAYS DILUTE BY ADDING SMALL AMOUNTS TO WATER SLOWLY AND SAFELY

marine bird fossilized guano

16x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 1 Pack new-releases We’ve taken cutting edge technologyImportant 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