These watercolor brush pen sets include three different color themes including outer space, tropical island and rainbow. The pens have the versatility of traditional watercolor packed into an easy-to-use pen and are great for calligraphy painting. Use the pens undiluted for vibrant, saturated colors, or blend with water for delicate watercolor effects like color washes or gradients. Details: Outer Space, Tropical Island and Rainbow Nylon brush tips 3 brush pen sets 24 pieces Water-based inks Mess free Easy to clean upFor all ages Contents: 21 blendable brush pens 3 water brushes