Letraset ProMarkers provide flawless color laydown, consistent coverage, and no streaking, making them ideal for design, illustration, comic art, and crafts. Filled with high performance, alcohol-based, permanent ink, ProMarkers feature a broad chisel nib on one end and a rounded bullet nib on the other. The ink is considered permanent and may be used on paper, card, glass, acetate, plastic, ceramic, wood, and metal. Secure "click-fit" caps prevent marker dryout.