Filtrete 3M Eureka Style RR Synthetic Vacuum Bag (Set of 10) 3M Filtrate vacuum bags are guaranteed to be free from defects in material and workmanship Synthetic vacuum bags expand as you clean allowing air to flow easily through the multilayer construction, trapping more dust and fine particles Replaces Eureka part numbers 61115B, 63295A, 63649, 62437 Replace bag every 30 to 60 days for optimum performance Fits Eureka 4870 Series Uprights, including Boss Smartvac Uprights