Refills for Pentel Arts Color Brush. The versatility of the Color Brush makes it easy to use between line and wash. The water-based dye ink dries quickly and produces rich intense colors. The durable nylon brush tip can flood wide strokes with solid color and then give a light touch to delicate lines. The refill barrels are easy to replace, and the reverse thread stops any leakage. Each pack includes 2 black ink refills. Sold as 6 packs for a total of 12 refills.