21_1/4x21_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety Adjust the placement position to

Adjust the placement position to your preferred height during installation

This probe features a fiber junction and gel electrolyte making it ideal for fertilizer solutions

Philips 4200K color temperature ceramic halide lamps

Plants will thrive year-round even under low water requiring temperate conditions or production using LEDs

Volume: 413 Gallon

21_1/4x21_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety Adjust the placement position toNordic 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