20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 2 Pack double-ended A simple way to raise

A simple way to raise a hood as plants grow

a thriving root zone leads to a thriving plant

Using microprocessor technology similar to a home computer this ballast will auto-detect and run both Metal Halide and High-Pressure Sodium bulbs

High Photon Efficacy – Achieves up to 2

Use as a dip for transplants and drench the root zone for root strength

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 10 Air Filters 2 Pack double-ended A simple way to raiseImportant 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. We also carry 4 7 8 and 5 1 4 inch depth filters,