10x33x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack cloning-&-seed-starting Keep the container tightly sealed

Keep the container tightly sealed when not in use

Full spectrum design with UV provides better spectrum similar to the natural sunlight covering each critical phase of growth from vegetative to flowering

Its heavy duty pre-galvanized steel construction is lined with premium European aluminum for years of dependable growing performance

QUARTS: Big Bloom

up to 8x stronger than General Hydroponics

10x33x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack cloning-&-seed-starting Keep the container tightly sealedNordic Pure Custom MERV 7 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition