Double rocker set (1+1) with labeling field System 55 clear anthracite. Notes: Writable rocker sets and rocker sets with labeling fields can be customized with individual labeling. The order is processed through the wholesaler specified during the ordering process of the rockers. Writable rocker sets and rocker sets without labeling fields are made of metal. This may lead to range reductions in radio applications. Professional labeling is available through the Gira labeling service.