16PCS Tattoo Cartridge Needles Size 1213 Round Mag / Curve Mag Summary quality cartridge needles engineered for consistent ink delivery, reliable stability, and comfortable handling during long sessions. Built with 316 stainless steel and refined structural features for precise lining and shading. Key features and benefits 316 stainless steel construction: higher hardness and improved corrosion and heat resistance compared with lowergrade alloys, with antioxidation treatment for consistent needle performance and longevity. Sharp, stable projection: precisely formed needle tips provide uniform ink insertion for even lines and smooth shading. Transparent tip with oblique cut: clear visibility of the needle and ink flow for better control and accurate placement. Siliconewrapped grip: nonslip, comfortable surface that reduces hand fatigue and is suitable for heavy tattoo pens and artists learning cartridge handling. Optimized ventilation hole: holds ink efficiently inside the tip to improve precision and reduce splatter during shading and packing. Upgraded silicone membrane and reinforced rib: prevents backflow and helps the cartridge maintain shape and function over repeated use. Enhanced stability structure: square cap and integrated injectionmolded housing minimize rotation and detachment, maintaining alignment for precise lining and shading. Compatibility and size Size: 1213 Round Mag / Curve Mag Compatible with cartridge machines that accept 1213 round mag and curve mag cartridges. Practical applications Shading and color packing on medium to large areas where consistent ink laydown is required. Smooth gradient blending and soft shading for portraits and realistic work. Repetitive sessions with heavy rotary pens or for artists developing technique, benefiting from the comfortable grip and stable cartridge housing. What you get 16 cartridge needles in 1213 Round Mag and Curve Mag configuration, designed for consistent performance and extended service life. Notes Use according to standard tattooing practice and cartridge machine specifications.