Feature●Carbon Activated Pre-Filter 4-pack for use with the FLT5000/FLT5111 HEPA Filter for AC5000 Series, Filter C by Complete Filtration Services (CFS)●4-Pack of Carbon Activated Pre-Filters Size 4.8"x19.25"●These Pre-Filters are designed to fit FLT5000/FLT5111 True HEPA Replacement Filter for AC5000 Series, Filter C●Carbon Activated filters extend the life of the hepa filter and remove common household odors●Carbon Activated Pre-Filter 4-pack compatible E Size, IAP-GG-125, FIL-GG-125 and the FLT5000/FLT5111 HEPA Filter for AC5000 Series, Filter C by CFSDescription Carbon Activated Pre-Filter 4-pack for use with the FLT5000/FLT5111 HEPA Filter for AC5000 Series, Filter C by Complete Filtration Services (CFS) This is a 4-pack of Carbon Activated Pre-Filters Designed to fit the FLT5000/FLT5111 True HEPA Replacement Filter for AC5000 Series, Filter C. Filters. This is not a OEM product. The brand names and logos are the registered trademarks of their respective owners. Any use of the brand name or model designation for this product is made solely for purposes of demonstrating compatibility.