The Onyx™ Mesh Marker Holder with Shelf is a magnetic whiteboard accessory that makes a great addition to any dry erase marker board for easy storage and organization. It includes four stand-up marker holders that fit most standard whiteboard dry erase markers, making it easy to grab a marker when needed and helping to ensure markers are stored upside down so that they last longer. This organizer also includes a 5"W shelf for storing the marker board eraser. Its magnetic back allows for use on whiteboards as well as any other magnetic surface and is strong enough to work on Magnetic Glass Marker Boards as well as standard magnetic whiteboards. This diverse caddy can also be mounted to a wall with use of a steel plate (included). The steel wire mesh construction is sturdy and also has a powder coat finish for scratch-resistance. The rolled edges are smooth to the touch and give a polished appearance to the caddy. Great for use alongside whiteboards in classrooms, meeting spaces, training areas, conference rooms or offices.