Professional superior artist quality dual-tip permanent art markers with 41 vibrant colors: 40 colors & 1 colorless blender. Excellent smudge-proof and waterproof qualities on most surface: paper, ceramics, glass, wood, cloth and so on.Dual tip: fine tip (approx 0.8-2mm) and chisel (approx 1-7mm) nibs for precise drawing, shading, sketches, outlining, note taking, blending, care making, common writing.Premium quality: Easily layer and mix different colors without worrying about smudges and blotches, as well single source of ink guarantees color consistency at both ends, allowing you to color in at least 300 m worth of drawings and blend beautifully for added dimension to your artwork and are non-toxic and acid-free.