The POSCA markers are true all-rounders! These color markers are water-based and suitable for all surfaces. This means you can use the POSCA markers on paper, cardboard, terracotta, plastic, metal, textiles, wood, ceramics, porcelain, and glass. The colors are opaque, covering, and dry quickly. On porous surfaces, the color is permanent, can be wiped off glass, and does not bleed through paper. The colors are water-mixable, blendable, and layerable (once dry). The POSCA PC-5M color markers have a medium tip, making them ideal for professionals and hobby artists for precise lines and perfect coloring. They are perfect for painting, coloring, drawing, writing, and marking. The set includes 8 colors: black, dark green, light blue, dark blue, red, pink, yellow, and white, with a nib size of 0.9 - 1.3 mm. The tip is reversible and replaceable, and it comes in an 8-piece set.