Unlike many "brush" pens, the Kuretake Zig Clean Color Real Brush pen has a genuine bristle tip that lets you create marks of any width - from broad strokes to fine lines. Filled with a waterbased dye ink that is odorless and xylene-free, these pens are easy to blend. - Kuretake Zig Clean Color Real Brush Pens - Warm Grey, Set of 6Kuretake Zig Clean Color Brush Pen, 6 WARM GREY - Includes one each of 900 Warm Gray 2, 901 Gray Tint, 907 Warm Gray 3, 908 WArm Gray 4, 909 Warm Gray 5, and 910, Warm Gray 10.