17x25x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes Perlite is a unique volcanic

Perlite is a unique volcanic mineral which expands from four to twenty times its original volume when it is heated

products for the calibration of pH and testing the cleanliness of the Bluelab Conductivity/Temperature probe

Spray when favorable weather conditions are expected

potting containers and gardening gloves

17x25x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes Perlite is a unique volcanicNordic Pure Custom MERV 8 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