Removable soft rubber to assure correct height, ease of use and to prevent scratching. The Head Swovels 360 Degrees and the brush enable it get arougnd and under furniture easily. The inner diameter is 1.38 inch(35mm), fits all vacuum cleaners accepting 1-3/8incn inner diameter attachment The front brustles have spaces between them to let larger particles through. Also works well on rugs. Designed with High-quality materials to thorough cleaning of dirt and dust. The ergonomic design allows the brush to be quickly attached and detached after use for easy cleaning, increasing the efficiency of your vacuum cleaner.