TESTORS-Enamel Paint Marker. These all-purpose enamel paint markers can be used on many kinds of surfaces and are available in a wide variety of colors for all of your design needs. This package contains one 1/3 fl.oz. (10mL) enamel paint marker (each color sold separately). WARNING-FLAMMABLE-Keep away from heat, flame, and children. Conforms to ASTM D-4236. Made in USA.