If you are purchasing new side trays or have trays with internal measurements of 6 1/2" x 10 1/8" or 6 7/8" x 10 3/16", these are the side tray palettes for you.  

The STRADA Expandable Palette for the Side Trays is half the weight of glass, unbreakable and just as easy to clean. 

Note: The easel will not lock properly if you choose to install an expandable palette in each side tray.