23_1/2x23_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack hand-tools 5-inch display is designed to

5-inch display is designed to go by the register at check out

you may notice insects with a whitish appearance

HO lamps: 4 included

With a handful of common tools

23_1/2x23_1/2x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack hand-tools 5-inch display is designed toNordic 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