Cen-Tec Systems 34828 Universal Dusting Brush Inner diameter is a standard 1.25 inch Made in the USA Works with most models of Bissell, dirt Devil, Dyson, electrolux, Hoover, Kenmore, mile, Oreck, Panasonic, Shark Compatible with major brands of central vac, including beam, Nutone, electrolux, Hayden, VacuMaid, Aggressor, Vacuflo, MD, Canavac, Cyclovac, air vac Cleans and Dusts tables, counter tops, air and heating vents, and window blinds