16_1/2x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack new releases The tray can be used

The tray can be used as a barrier for pests when flooded as most crawling pest cannot swim (slugs

633 and the FS+UV to create a custom light spectrum for a start-to -finish combination

Maximizes flowering and fruiting potential for higher yields

Suitable for airstream temperatures up to 140°F (60°C)

16_1/2x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack new releases The tray can be usedNordic Pure Custom MERV 8 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