Arteza Premium Black 12 Count Oil Based Paint Markers Med Bullet Nib Our Set of 12 Oil-Based Markers (in Mars Black), is the perfect set of painting markers for artists of all ages and artistic levels. To use our markers simply shake, pump, and create. Make sure to check out the helpful tips available to you through the scannable QR Code on the packaging of your new set of oil-based paint marker pens! Since our oil based markers are non-toxic and quick-drying, they?re a great set to add to any classroom or home. They can be used on most surfaces, including stone, glass, wood, metal, fabric, canvas, plastic, paper, vinyl, rubber, concrete, and leather.