13x21_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Emitters ZL6146A Features a 3-position telescopic

ZL6146A Features a 3-position telescopic pole which extends from 44-Inches

and enhancement of the microbial population in the growing medium

top it with a 6” FloraCap® and you are ready to hand feed

20 lbs treats up to 7

2U and 3U blank and vented panels are also available

13x21_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Emitters ZL6146A Features a 3-position telescopicNordic 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