21x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack cloning-&-seed-starting FIXTURE DIMENSIONS:42"L x44

FIXTURE DIMENSIONS:42"L x44

This offers the grower a lighter weight option than heavy bags of wet soil

and plums to prevent gray mold and brown rot

It includes a full daylight spectrum 125W 6400K compact fluorescent lamp

three-layer SMS fabric (Spunbond Meltblown Spunbond) protects against light liquid splashes and sprays and provides a superior particulate barrier

21x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack cloning-&-seed-starting FIXTURE DIMENSIONS:42"L x44Nordic Pure Custom MERV 8 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