ART COLORING PENS: 24 Basic colors drawing marker pens DUAL TIPS: Fine and chisel tip are great for projects with small and large areas QUALITY INK: Nox-toxic, odorless ink , dry fast, blend well and conform to ASTM D4236 PACKAGE AND PROTABLE: Come with a studry display case. Nice choice for gift. WIDE APPLICATIONS: Perfect for flesh, face, manga, portrait, illustration, sketch.One of the best marker maker company in the business. Very durable with twin head (one head is broad and one head is fine). Quite strong and superior. Art Professional Sketch Markers. Drawing Animation Graphic Design. Pro Twin Marker Set. Permanent and quick drying opaque paint. Ink is waterproof, fade proof and acid free. Ideal for personal arts and crafts, office marking, and color coding.