13x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack rockwool Pura Vida Grow & Bloom

Pura Vida Grow & Bloom contain sufficient nitrogen

10' drain tubing

Max-Fan™675 168

Base Size: 9

13x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack rockwool Pura Vida Grow & BloomNordic Pure Custom MERV 7 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