Designed and patented for optimum ergonomics, VERSUS Cartridges feature a special internal construction for improved ink storage and ink jetting. The line pins are designed to maintain an ideal ink volume, providing the precise amount of ink for greater plotting accuracy. Shading pins allow for proper ink flow for superior shading. Each cartridge uses its own steel mould to ensure greater accuracy and reduce vibration. Manufactured with high quality plastics and Japanese steel needles, they ensure exceptional durability, sharpness and hardness. The patented membrane design ensures stable and perfect work. The best steel needles are carefully selected for each cartridge, and the final assembly is done with automatic equipment to ensure the highest level of quality. Each box contains 20 cartridges. Get them exclusively fromIn Tattoo Veritas.