This set contains 8pcs 6mm bright colored water soluble chalks for all kinds of craft projects. Made of premium material, it is safe and non-toxic. The acid-free ink flows smooth and doesnt bleed on marker paper. They are easy to hold and use, providing great visual results. A nice choice for art class or family recreation.Feature Color: As shown. Material: PP. Size: About 14 x 1.6 x 1.6cm(LxWxH). This set contains 8pcs 6mm bright colored water soluble chalks for all kinds of craft projects. Kid-friendly, and acid-free ink flows smooth and doesnt bleed on marker paper. Chalks are easy to hold and use, providing great visual results. Ink flows smooth and blends well. Easy to self-clean after blending by scribbling on a separate piece of paper, thus returning the marker to its original color. The chalks are easy to hold and use, providing great visual results. A nice choice for art class or family recreation.