The “Appentice Cartridge” the future of tattoo practice. I created the pen cartridge so artist could utilize their personal machine to enhance their skills. This cartridge is a the perfect tool for any tattoo apprentice or proffesinal.(tattoo, Pmu, Smp or even traditional artist). The Appentice cart will instill muscle memory for better hand control. Also learn techniques used in tattooing for example, pendulum, whip or stipple shading. This is great when you’re ready to practice when ever you want. The Appentice cart made specifically for apprentices.