21_1/2x23_3/8x1 Exact MERV 7 AC Furnace Filters 6 Pack reflective-and-greenhouse-films Rinse the probe after use

Rinse the probe after use in fresh water and clean once a month to ensure the Commercial Truncheon Nutrient Meter remains accurate

• User select 6 buffer types

Silver Bullet and Mini trimmer machines

• Two slots ensure proper positioning for optimal blade sharpening

21_1/2x23_3/8x1 Exact MERV 7 AC Furnace Filters 6 Pack reflective-and-greenhouse-films Rinse the probe after useNordic Pure MERV 7 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 and other contaminants are removed. MERV 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters