The Round Dusting Brush (AO-16), Upholstery Nozzle (AO-19) and Bare Floor Tool (AO-43) usually have horse hair rather than nylon brushes. Horse hair does not get statically charged so easily, and therefore does not retain small particles of grit which can leave tiny scratches on wood or ceramic floors. We do not charge extra for horse hair attachments, but they can be difficult to obtain and are not always available.