FLT9400 Air Purifier Replacement Filter Model K Compatible with GermGuardian FLT9400 360° True HEPA Air Purifier AC9400 AC9400W AC9400WCA Compare to Part FLT9400 - Pack of 1Disclaimer: This is NOT a GermGuardian OEM product. The GermGuardian brand names and logos are the registered trademarks of their respective owners. Any use of the GermGuardian brand name or model designation for this product is made solely for purposes of demonstrating compatibility.