15x18x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack hydro-components Ultrasonically bonded edges provide improved

Ultrasonically bonded edges provide improved product strength and integrity

Six 11" round ventilation sockets

Plant bugs

250 Million 5 Acres Next Day

Begin using TundraTM at the onset of the flowering cycle and continue use through the flowering/fruiting stage

15x18x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack hydro-components Ultrasonically bonded edges provide improvedNordic Pure Custom MERV 14 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