15x25x1 Exact MERV 14 AC Furnace Filters 12 Pack tents-/-indoor-greenhouses These sachets are for use

These sachets are for use with the Hanna HI9813-6 GroChek portable pH/TDS/EC/Temp meter

The three temperature and humidity outlets offer customizable day and night set points while the cycle timer outlet controls any device requiring a repeated on/off function during a 24 hour time period

Input Voltage:                                         120 Volts AC

The #4 is the largest perlite on the market and averages a whopping size of around 1 in

15x25x1 Exact MERV 14 AC Furnace Filters 12 Pack tents-/-indoor-greenhouses These sachets are for useNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.