20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack reflective-and-greenhouse-films Compatible with Gavita EL Master

Compatible with Gavita EL Master Controllers (sold separately) and most building automation systems

UPGRADED: Four scales: µS

Intended for non-selective control of grasses and broadleaf weeds (both annual and perennial) in and around all crop and non-crop areas

through eons of aging

"Smart" system with backup memory and internal battery

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack reflective-and-greenhouse-films Compatible with Gavita EL MasterImportant 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,