Eureka Vacuum Bags F&G 52320B-6. For machines that connect at the bottom on the cloth bag with spring. For Eureka and Sanitaire models 200, 600, 1400, 1900, 2000, 4000 except 4300-4600, 5000 series except 5180-5190-6700 and 5800. Will also fit most Koblenz uprights.