Audio-Visual Direct Magnetic Marker Tray For Dry-Erase Boards. Organizing your dry erase markers in your boardroom, office, home or school has never been easier with our minimalist marker holder tray. Our aluminum marker tray mounts securely with the high powered magnets included within each marker tray. This prevents our tray from sliding down the board. The aluminum metal is durable and prevents scratches while being easy to clean. Smooth rounded corners and edges along with two ridgelines on the tray prevent the markers from rolling off. This high-quality aluminum tray is versatile and simple.