17x26x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack dupe The attached metal feet allow

The attached metal feet allow you to use this ballast on a flat surface or mount it on walls

Power (Watts) - 250W

It's a "win-win" relationship

- Optimum light return for your plants

17x26x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack dupe The attached metal feet allowNordic 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