18_1/4x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl_hrg 8 compressed coir sheets formulated

8 compressed coir sheets formulated with a premium blend of coir

Zenport AZD50 Accuzen platform mechanical spring dial scale accurately measures weight of grain

aluminum housing and features heat-dispersing fins on all 4 sides

A high performance drainage layer is especially important if your plants are grown in plastic containers or with saucers underneath which can trap excessive moisture and create a soggy root zone

Designed to sit comfortably on your shoulder

18_1/4x22x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack spl_hrg 8 compressed coir sheets formulatedNordic 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