15x19x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety do double duty: They retain

do double duty: They retain water

The HI98107 tester features a large multi level LCD which displays both pH and temperature readings simultaneously

Trigger Cable Voltage: 120V

ETL-listed

15x19x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety do double duty: They retainNordic 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