The Ultra surface brush (Stone) is an accessory for the Picobella cordless surface brush. The robust steel brush is ideally suited for intensive cleaning of stubborn dirt, deposits, lichens, moss, and rust on coarse, rough, and insensitive stone surfaces, such as granite, porphyry, or quartzite. The included special side brush is perfect for edge work, allowing access to corners and edges, as well as for cleaning stairs and bases. The Ultra brush is not suitable for polished, ground, or sealed natural and artificial stone surfaces. The brush diameter is 115 mm, and the working width is 215 mm.