These brush pens feature a firm yet flexible brush tip, allowing easy transition from thick to thin lines by changing pen pressure. Great for beginner brush calligraphy, hand lettering and illustration. Water-based pigment ink allows rich vibrant colors that won't bleed through most papers. Non-refillable. The 10-Pen Set includes one each of black, gray, red, orange, yellow, green, blue, purple, pink and brown. Brand: Tombow