12_1/2x23_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Water Pumps & Irrigation Supplies Other features include smaller

Other features include smaller

KALIX Potassium is fully soluble and contains 50% potash naturally derived from potassium sulfate

Full battery charge will complete 17

Early season monitoring can be done with blue or yellow sticky traps

12_1/2x23_1/2x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Water Pumps & Irrigation Supplies Other features include smallerNordic 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