12x20x1 Pleated MERV 13 Air Filters 6 Pack cloning-&-seed-starting It has two pull chains

It has two pull chains that allow for easy adjustments of speed or direction

Softbow handle fits comfortably in left or right hand

Premium hospital wheel casters for effortless mobility on all surfaces with toe touch locking wheels

Replace only the pH probe

12x20x1 Pleated MERV 13 Air Filters 6 Pack cloning-&-seed-starting It has two pull chainsNordic Pure MERV 13 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200