APOGO 4 Color Paint Marker. Set of 4 color oil-based ink paint pens. Permanent, waterproof, opaque, non-toxic and low odor. Suitable for stone, metal, wood, glass, cars, tires and almost all surfaces. Used for marking, decorating, painting, crafts, touch up paint, etc. What can these paint pens be used for? -They are oil based paint markers, meaning that they can work on almost all surfaces. -These permanent marker pens will write on the following surfaces glass, paper, cardboard, fabric, pumpkin, rubber, plastic, canvas, metal, aluminium, brass, cars, wood, stone etc. -They can be used by engineers to make permanent colorfast marks on wood and metal. You can use these paint pens on a variety of surfaces, which makes them perfect for creating painted rocks, customized mugs, or posters. They are a versatile addition to your art supplies. Why choose us? -Marks on anything, oil based paint. -Oil based paint, not transparent. -The pen is made of a metal outer which holds. -Brand new and comes sealed in plastic. -The tip of the pen is approximately 2.0mm-2.8mm. Description No xylene and toluene. Ink are comply with the European union-ROSH directive. Do not burn, even when empty. To clean off, use mineral turpentine or alcohol.