pass the ASTM D4236 &EN71 1.2.3.9 test&pre-registerd REACH. dia.21MM water color cake, 1,2,3,4,5,6 layers are all OK! Diameter 21mm , 18 colors, plasitc box.you can choose one layer, double layers or three layers.packaging: oppbag, or blister cardwater color cake( paint cake,color cake) 3 layer water color cake