SPT 2102-HEPA Replacement HEPA Filter For use with AC-2102 Heavy Duty Air Cleaner and AC-9966 DC-Motor Duty Air Cleaner

these filters have a proprietary size. that means that you're stuck buying them at inflated prices. they do not last long enough to justify the price point at which these are being sold at. I cannot recommend the device or the filters because of that factor alone