Excellent Quality Replacement Filter Made by VacFx 99.97% Filtration down to .3 microns (HEPA certified filter) Fits Models : Eureka HEPA filter that fits Eureka style HF-5 (part 61830, 61840) fit the Eureka models; 5850AZ, 5851AV, 5852AV, 5853A, 5855AZ, 5856AV, 5857AZ, 5890, 5892AZ, SC5845A, and Sanitaire model SC5800A. Part NO.: 61830 & 61840 (HF-5)