Designed to Fit Eureka Boss Signature Genesis, Eurkea Powerline Limited Edition, Eureka LiteSpeed Models 5700-5739 and Series 5800-5839 Also Fits Some Sanitaire Commercial Vacuums Requiring LS Bags Original Manufacturer's Part Number: LS, 5700, 5800, 62123, 61820A, 61820B, 61280 Micro-Lined 2-ply Filter System Filter 99.7% Efficient Down to 5.0 Microns and Can Capture Particles as Small as 0.1 Micron. Micro-Lined Bags More Than Double the Performance and Clean-ability of your Vacuum Cleaner as Compared to Conventional Bags! If You Are Unsure About Your Model. Please Contact US! New Item: New Items Have Never Been Used. These Items Are Still Covered Under Our Return Policy.