21_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack led The internal strap is a

The internal strap is a tidy way to tuck away the probe cables

works best in warm weather above 60°F

These sleeves are ideal for nonhazardous work environments where you need reliable liquid and particulate protection

Product Dimensions: 20

Features a LED display panel

21_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack led The internal strap is aNordic 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