17x27x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Tents / Indoor Greenhouses -case shell made of polypropylene

-case shell made of polypropylene (PP) - ABS plastic

strawberry weevils

• 1000W e-Start lamps operating on a switchable core & coil ballast must be run on the HPS setting

It contains the naturally occurring microbes Trichoderma harzianum strain T-22 and Trichoderma virens strain G-41

17x27x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Tents / Indoor Greenhouses -case shell made of polypropyleneNordic 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