21_1/2x23_5/16x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack trays Suitable for airstream temperatures up

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

which are used to offset plant stretch induced by the sun’s far red radiation

- Cylindrocladium

Saboten's Tungsten Carbide Sharpener is ideal for sharpening and honing all straight blades

21_1/2x23_5/16x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack trays Suitable for airstream temperatures upNordic Pure Custom MERV 12 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