1LINER SHADER: Tattoo ballpoint pen cartridges are perfect for both lining and shading, allowing you to create precise and intricate designs with ease. 2IMPROVE YOUR SKILLS: Cartridges are ideal for practicing and honing your tattooing technique. Use them on tattoo paper to improve your skills before working on actual skin. 3ANTI DRYING FORMULA: Ink in these cartridges is specially formulated to resist drying, ensuring a consistent flow and preventing clogging. Say goodbye to frustrating interruptions during your tattooing sessions. 4INDIVIDUAL PACKAGING: Each cartridge comes in its own sealed packaging, ensuring hygiene and preventing any leakage or contamination. These cartridges are ready to use right out of the package. 5SELF INKING: With a capacity of 0.2ml per cartridge and with a writing length of approximately 300m, the 0.5mm diameter rolling ball tip ensures effortless and precise line work. 6VERSATILE AND COMPATIBLE: Tattoo ballpoint pen cartridges are compatible with both tattoo cartridge machines and manual tattoo pens. Whether you prefer machine or hand tattooing, these cartridges will meet your needs.