15x30_3/4x1 Exact MERV 13 AC Furnace Filters 6 Pack Hand Tools PfrSpec targets far-red wavelengths for

PfrSpec targets far-red wavelengths for photoperiod control and stem elongation

up to 3 points (5 points*) calibration

The Original ExHale CO2 Bag produces CO2 24 hours a day with no need to refill bottles or use expensive CO2 production units

Get creative: mount to walls

Never before has there been a pH controller with these features for this value

15x30_3/4x1 Exact MERV 13 AC Furnace Filters 6 Pack Hand Tools PfrSpec targets far-red wavelengths forNordic 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