This is the E04 Lipstick Natural sketch marker by Copic.  Sketch markers are available in 358 colors. Choose from a stunning palette, including a wide range of gray tones. Replaceable nibs Refillable ink Alcohol-based ink is permanent and non-toxic Dries acid-free Medium Broad nib for thick strokes Super Brush nib for variable-width strokes 3 nib options Easy-to-read color names and numbers Compatible with the Copic airbrush system