SAKURA HOBBY CRAFT 3D Crystal Lacquer Color Pens, Essential Each essential color has a 0.35-mm fine tip, is easy to use, and has a pen style applicator Water base net 0.5 fluid ounces per color It is acid free and non-toxic; conforms to astm d4236 Adult supervision strongly recommended for usage by children Available in black, orcher, turquoise, cerise, fawn, and navy blue colors