Each pen has two tips with different thicknesses. One is designed for drawing large lines and colouring large areas, while the other is great for drawing thin lines and details. The range of colours includes 6 fluorescent colours (yellow, orange, red, pink, blue and green), which are characterized by clarity and saturation due to high pigmentation. The ink of these markers was made on the basis of water, which is why they are safe for health and environmentally friendly.