20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 13 Air Filters 4 Pack Growing Media Pulse Width @ 4500V (Microseconds)

Pulse Width @ 4500V (Microseconds) - 1

Available in two models with transfer capacities of 2642 GPH (this model

Flower Finisher is intended to increase terpene profile and aroma while adding natural weight and density

Indoor Cultivator

Designed to drive either halide or sodium bulbs properly with separate wire leads

20x25x5 (4 3/8) Lennox X6673_X6675 Replacement MERV 13 Air Filters 4 Pack Growing Media Pulse Width @ 4500V (Microseconds)Important 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,