Style U bags fits the following Electrolux upright vacuum cleaner
models: Discovery II, Discovery III, Epic 3500, Genisis, Genisis LX, Genisis LXE, Lux 3000, Lux 4000, Lux 6000, Commercial uprights, and Prolux. If you have a very old Heavy Duty Electrolux upright vacuum cleaner for the Lates '70's or early '80's than that machine will take a style UR Electrolux vacuum cleaner bag. Style B bags fit Aerus Electrolux lightweight upright models: Lux Lite and Freshera. Electrolux Trivac vacuum cleaner bags fit the older Electrolux stick vac.