These are 10 generic Sandia backpack vacuum cleaner bags that fit the 10 quart size. These bags are made to fit Sandia part number 10-0006. These bags are micro lined, and have an inner liner of electrostatically charged material to capture microscopic particles. These bags fit the following Sandia Plastics XP-3 Whisper 10 WERK.20 models; Super Raven 10, XP-3 Whisper Raven 10, HEPA Raven 10, 220 Raven 10. 10 Bags per package.