Jack Richeson Lock Box Palette System Disposable Liner Refills, White, Pack of 40 Liners protect the mixing surface and makes clean up a snap. They are made to fit the Jack Richeson Lock Box Palette System. Travels well whether you're moving around your studio or from class to class Great for saving and mixing colors Economically priced to fit your budget Substantial set is perfect for classrooms, childcare facilities and recreation centers