21_1/2x23_3/8x1 Exact MERV 7 AC Furnace Filters 6 Pack reflective-and-greenhouse-films • Two slots ensure proper

• Two slots ensure proper positioning for optimal blade sharpening

This is difficult to achieve in facilities (modern or older) due to short comings in HVAC design

Silver Bullet and Mini trimmer machines

• User select 6 buffer types

21_1/2x23_3/8x1 Exact MERV 7 AC Furnace Filters 6 Pack reflective-and-greenhouse-films • Two slots ensure properNordic 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