are made of steel strip and are used for the installation of ring brushes onto municipal equipment rollers between brush discs. Typically, the number of distance rings corresponds to the number of mounted brush discs.
Sometimes, to reduce the density of the brush roller, an additional spacer ring is used. It helps not only to achieve the desired density of bristles, but also to reduce the weight of the whole brush mechanism. After replacing worn-out brush discs, the rings may be used again.