Those are plain practice skins, which come with great ductility and similar feel as human skin. By using this practice skin, rookies can learn techniques, get a better feel for what It'll be like to a person and build strong confidence. Veterans can also use practice skin to try out new techniques. You can also save your artwork as your progress or show the excellent examples of your art, to show off your different skills. Our skin practice can be used with machines, needles, kits and other equipments. Features - Color: As Shown. - Material: Silicone. - Size: About 20x14x0.6cm - You can use it for needles, kits, machines and other supplies. - Made from synthetic skin-like material and better skin touch feeling. - Allow plain surface for design and practice, practice different techniques, from outlining to shading for tattooing. - Flexible and has a similar feel as human skin, Thick enough for double sided usage.