23_3/4x23_3/4x1Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Reflectors & Grow Lights - Blink in 1 Second:

- Blink in 1 Second: Under or Over Voltage Protection

Built-in defrost system engages at 32°F

Color Temp / CRI 5500 /75 K/CRI

Effective against spider mites

Additional natural veganic ingredients have also been added to facilitate high metabolism and growth rates in all plants

23_3/4x23_3/4x1Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Reflectors & Grow Lights - Blink in 1 Second:Nordic 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