9x13x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Sea Green Hydro Testing for phytotoxicity and compatibility

Testing for phytotoxicity and compatibility is recommended before widespread use on plants or mixing with other products

Measures 40'' x 86''

the DBT Model 0 features 2 handles and weighs in at just 28 pounds

Bluelab pH Probe KCI Storage Solution is made specifically for use with Bluelab pH products

An expandable fit with an elastic closure comfortably accommodates a wide range of hairstyles without pulling on hairs when removed

9x13x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Sea Green Hydro Testing for phytotoxicity and compatibilityNordic Pure Custom MERV 12 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