The inner diameter is 1 25 inch(32mm), fits all vacuum cleaners accepting 1-1/4inch inner diameter attachment such as for Hoover, Bissell, Eureka, Royal, Dirt Devil,Electrolux,Panasonic, Kenmore,Shop Vac, Oreck etc 12 inches wide, swivel neck with durable plastic and scratch-free rubber wheels Natural Horse Hair Bristles Natural horsehair bristles,considered the best material for vacuum cleaner tools The front brustles have spaces between them to let larger particles through Also works well on rugs Fits all vacuum cleaners that accept standard 1 1/4 inch; inside diameter attachments Colour: black Material: ABS Size: 298x52mm Package Contents:1 * Brush Head1 * Cleaning brush Only the above package content, other products are not included Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing The measurement allowed error is +/- 1-3cm