8_1/2x30x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts Growth Science® Base A and

Growth Science® Base A and Growth Science® Base B should be used together for best results

Clean scissors easily in seconds and without a mess using the efficient and portable Scissor Scrubber

More powerful and efficient than standard centrifugal fans

Multi-volt capability: Can be run at either 120V or 240V

Paired with durable handles that make transportation easy

8_1/2x30x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts Growth Science® Base A andNordic Pure Custom MERV 13 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