19 Cobalt Blue - Stockmar Wax Crayon SticksIndividual Cobalt Blue (19) Crayon Stick We are offering the sticks individually so you can easily assemble your own set of your choice of colors and then refill your sets, if one gets lost, broke or used up with out having to buy a whole new set. Stockmar wax crayons meet the highest artistic standards. Through the addition of pure beeswax as a binding agent, the light resistant pigments display their purity and full brilliance. Because they are