Uni-Paint oil based, valve-action paint marker marks opaque and glossy on light or dark surfaces. Use it on virtually any surface: glass, metal, wood, rubber, stone, plastic, paper, vinyl, leather, canvas and more. Comes in a variety of tip sizes. Keep the Uni-Paint PX-21 Oil Base 6 Color Set in reach for your next project: BLACK, RED, BLUE, GREEN, WHITE, YELLOW