Surebonder CP2-1 2 Piece Wax Pucks for Cray-Pen Painting Tool, White/Black Includes: 1 black color wax puck and 1 white color wax puck Dip the tip of your Cray-pen into wax puck and paint Achieve watercolor and oil painting effects by blending and applying thin or thick layers Used with Cray-pen painting tool- #cp-1 Additional color wax pucks available-#cp6-1, #cp6-2, #cp6-3, #cp2-3