WHITEBOARD MARKER & ERASER ORGANIZER- Our durable acrylic dry erase markers holder features 10 round slots and 1 shelf at the bottom, which can hold up to 10 dry erase markers and have a separate space to hold an eraser. The diameter of the round slot is 0.8 inch, which works nicely to hold standard size dry erase markers. PREMIUM ACRYLIC- Our acrylic dry erase marker and eraser storage rack is made of high quality transparent and eco-friendly acrylic, which is much more durable and sturdy than others. It is perfect for home, office, school or institution. LARGE SPACE FOR ERASER- With the no ridge design for the eraser holder, this black wall mounted storage rack offers you a greater space to get your hand in for storing and taking whiteboard accessories freely and quickly. 2 WAYS TO INSTALL- You can install our acrylic dry erase wall marker holder next to the whiteboard by using included screws and anchors , or just stick the acrylic marker holder with specific adhesive tapes on the wall without drilling. *WARM TIPS*- Dry erase markers and eraser are not included. YOUR CONCERNS- The diameter of the round slot is 0.8 inch, which can work nicely to hold standard size dry erase markers.