Genuine Eureka DCF-21 Vacuum Filter, Case Pack of 2 Filters EUREKA Dcf21 filter 2 filters per case For optimum performance change filter every 3-6 months Designed for eureka upright models 460, 3270, 3280, 4230, 4240, 8810, 8860, 8870, AS1000 and AS1040 series