The Envy Gen 2 Cartridge features a sleeker, lighter design and the industry's first finger ledge; providing a level of comfort and control never before seen in a needle cartridge. Artist ApprovedDriven by artists innovation, TATSoul puts artist feedback into each product design Finer DetailEngineered & optimized to exceed the quality standard of the facial esthetics industry, the Nano cartridge needles empower artists to create fine lines and realistic hair strokes. Quality ProcessEnvy has the highest standard QC process in the industry. Each needle must undergo a thorough 30 point inspection process before it can earn the Envy name Cartridge Finger LedgeA unique and industry-first feature, the cartridge finger ledge gives you the perfect place to rest your finger while working Product Specifications Lead-Free solder Improved membrane for optimized tension and preventing ink spitback Patented finger ledge for precision and comfort Updated profile mold for better needle visibility 10 cartridges per box