Generic Eureka HF-5 Replacement HEPA Filter Product Features Excellent Quality Replacement Filter Made by EnviroCare Technologies 99.97% Filtration down to .3 microns (HEPA certified filter) Designed to Fit Eureka LiteSpeed Models Will Fit Eureka Parts 61830 & 61840 (HF-5) Product Details ASIN: B001738HXG Item model number: hf-5 Product Description This is a generic Eureka HEPA filter that fits Eureka style HF-5 (part 61830, 61840). This filter is designed to fit the following Eureka models; 5850AZ, 5851AV, 5852AV, 5853A, 5855AZ, 5856AV, 5857AZ, 5890, 5892AZ, SC5845A, and Sanitaire model SC5800A. This filter should be replaced at least once a year. For homes with severe breathing issues such as asthma, or for homes with severe allergies, you should replace this filter every 6 months. The more often you replace this filter, the longer your Eureka vacuum cleaner will last you.