16_1/2x21_5/8x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow-light-ballasts 3 - 4 mm long

3 - 4 mm long

*315W SINGLE ENDED LAMP SOLD SEPARATELY

How do I mix and apply the concentrate

They will find alternate food sources* in the absence of prey

1 or 2 point

16_1/2x21_5/8x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack grow-light-ballasts 3 - 4 mm longNordic 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