Eureka filter HF-8 is also known as the MM Eureka HEPA filter.
The HF8 / MM filter fits canister Eureka and Sanitaire 3670, 3684, 3685, S3681, SC3683, S3686 and 3695 series vacuums.
Eureka universal replacement filter part 60666, 60666A and 60666B
Eureka Mighty Mite Pet Lover model 3684F vacuum is an example of a canister vac that uses the HF8 / MM filter.
Replace Eureka HF8 filter every 6 months for to maintain optimal filtration performance.