16_1/4x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors • Multifaceted computer-designed aluminum interior

• Multifaceted computer-designed aluminum interior for maximum efficiency

Carefully clean for reuse

and container gardening

without releasing byproducts into your water supply

Total length of sheath is 13-Inches

16_1/4x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Reflectors • Multifaceted computer-designed aluminum interiorNordic Pure Custom MERV 13 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