It has two slide-out mixing surfaces, a removable water bottle (60ml) and clip-on water cup, plus a unique 4-pan cartridge system that clips easily into place, making pan replacement and color change a snap. The colors included in this set are cadmium yellow pale hue, cadmium yellow hue, cadmium red pale hue, alizarin crimson hue, ultramarine, cobalt blue hue, sap green, viridian hue, yellow ochre, burnt sienna, burnt umber and Chinese white.