Onyx it. The Onyx mesh marker basket organizes your whiteboard dry erase markers, eraser and other items within reach. Up to four markers stand up vertically for quick use. This smart marker basket has a magnetic back that allows for use on magnetic marker boards rumba models 2014Wbs, 2015Wbs, 2016Wbs and 2017Wbs or impromptu models 8511BL and 8511Gr (sold separately). mounting hardware is also included for wall mount. Steel mesh construction with durable powder coat finish.