Richeson - Shelf Help - Left - Shelf Help by Richeson is a great tool for plein air painters! These metal shelves attach to your easel allowing you to expand your outdoor workspace. Each lightweight aluminum shelf features a slotted side edge to hold up to 10 brushes and comes with a plastic brush holder and two adjustable elastic straps to hold the brush holder and other tools. Shelves are made to attach to most common sized easels and up to two shelves will fit inside most French Easels. Shelf Help is available for right or left handed artists. Shelf dimensions are 16.25 x 10.5 in.