Hi, thank you for your great question. The Eureka 6856A, 6856B, and 6856C are all Eureka Powerteam canisters, and they take the same bags, Eureka Style V bags. The Eureka V bags are sold in several different types. They come in the standard Eureka brand, part numbers http://www.govacuum.com/eureka-v-filteraire-vacuum-bags-genuine-3-pack-part-57698a-52358.html 52358A and 52358B or we also sell the Filterate brand of Eureka bags, which are for people who suffer from allergies and asthma, Eureka part 57698A, and 57698B (the only difference between A and B is the color of the packing Eureka uses). They also carry the generic Eureka Style V bags by Envirocare. I have also attached a parts schematic of your vacuum cleaner to this email so that you may have a copy for future reference on part numbers. http://www.askgovacuum.com/6856D_A_B_POWERTEAM[1].pdf Schematic of Eureka Model 6856. Hope this helps.