Introducing the 4pk Replacement Filters, Fits Eureka DCF21! These replacement filters are the perfect way to keep your vacuum cleaner running smooth and efficient. Our filters are washable and reusable, so you won't have to worry about replacing them often. Plus they're compatible with part 67821, 68931 & EF91 for a seamless fit in your Eureka DCF21 vacuum. Enjoy superior air filtration as these high-quality filters trap dust and other small particles that can cause clogs or damage your machine's motor over time. Get peace of mind knowing these reliable replacement filters will help extend the life of your vacuum for years to come!