HQRP HEPA Dust Cup Filter 2-Pack for Eureka DCF-21 68931 68931A DCF21 E-68931 fits EF91B EF91 EF-91 67821 3270 3280 4230 4240 8810 8860 8870 4235AZ 4236AZ 4239AZ Vac Vacuum Cleaner Coaster HQRP&reg; Two HEPA Filters plus HQRP&reg; Coaster; This filter is H13 filtration class and retains 99.99% of particles down to 0.3 micron; 100% Compatible with Original filter; 2 weeks DOA replacement warranty!