20x34x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage Once in calibration mode submerge
Description
20x34x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack food & water storage Once in calibration mode submerge Once in calibration mode submerge the probe in 1382 ppm calibration standard 05 14 GPM
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