11x32_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack steel plant stake The SS 550 features fully

The SS 550 features fully programmable spectrum control which enhances plant growth and increases yield

Unlike common AC-powered duct fans that suppresses voltage to control fan speeds

With its versatility and durability

Root Drench: 0

plant root development and boosts fermentation in plants

11x32_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack steel plant stake The SS 550 features fullyNordic 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