12_3/4x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow-light-reflectors This is achieved by the

This is achieved by the geometry of its patented reflector

- Flora Pipe Fitting (elbow 1")

Faster germination

and 7" tall humidity domes and seedling tray/plug inserts

Fixture comes with industry thickest heatsink guarantee you less heat and longest product lifespan

12_3/4x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow-light-reflectors This is achieved by theNordic 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