Treadmill desk workstation for most Flat Handrails up to 33 inch, includes Protection Strip and Phone Slot. Remember: If this product visibly covers your treadmill heart rate/speed/on-off buttons, it may not be the best attachment for your treadmill. Recently there are lots of returns on this product, the feedback mostly says that the tray is too big. However, you can clearly see the product size parameters in the image and description. So please take into consideration these details before ordering This second generation treadmill desk is designed with a tablet holder and edge guard. Walk while Working Transform your work routine with this sturdy 36" x 15.4" x 0.78" desk for treadmill.