18_1/4x22x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack lighting-&-electrical-components Root Pots are designed to

Root Pots are designed to break down and return to the earth after multiple seasons of use

Hortilux uses a glass that allows the UV light to pass through benefiting plant growth

perfectly cover 5x5 ft (flower)

200K (Veg)

FDA Listed Medical Device

18_1/4x22x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack lighting-&-electrical-components Root Pots are designed toNordic 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