The Karin Realbrush Pigment Markers are designed for ease and versatility. These markers use top-quality materials, with bright, bold ink that pops on almost any surface. The 2.4 ml ink capacity ensures a long lifespan. The flexible 4 mm brush tip offers smooth control and precision. - Karin Realbrush Pigment Markers - Grey Colors, Set of 12Realbrush Pigment, GRY 12CT - This set includes Neutral Gray 1, Neutral Gray 2, Neutral Gray 3, Warm Gray 1, Warm Gray 2, Warm Gray 3, Cool Gray 1, Cool Gray 2, Cool Gray 3, Curry, Olive Green, and Olive Black.