23_3/4x23_3/4x1Exact MERV 7 AC Furnace Filters 6 Pack pumps-&-irrigation or additives can be added

or additives can be added if the grower desires different specifications

Silicon is the second most abundant element in plants and with out it they can not survive

precision engineered for every type of pruning or trimming application

●【No-fan Design & Aluminum Heatsink & Removable Driver】 No fan design

23_3/4x23_3/4x1Exact MERV 7 AC Furnace Filters 6 Pack pumps-&-irrigation or additives can be addedNordic 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