The Daler-Rowney System 3 Fluid Acrylic Liner, Set of 10 Colors - 29.5ml is made of rich lightfast pigments and a fluid acrylic base made for pouring and dripping techniques. The tapered tip of the liner is perfect for contour effects and precise line work. You can play with different painting techniques because the fluid colors are compatible with all System 3 paints and mediums. Best of all, the System 3 Fluid Acrylics have great covering power, so you can cover a large surface area without wasting a lot of paint.