Product: 20pcs Mixed Disposable Tattoo Cartridge Needles, Round Liner and Round Magnum, for Cartridge Tattoo Machines, 5RM and 7RM, 12# Overview Precision disposable cartridge needles designed for cartridgestyle tattoo machines. This mixed pack contains round liners and round magnums in common configurations for lining, shading, and color packing. Singleuse cartridges help streamline workflow and simplify needle changes during sessions. Key benefits Readytouse mixed set: 20 cartridges in one pack with 5RM and 7RM configurations and 12# needle size for a range of common tattoo tasks. Fast swapping and consistent setup: Cartridge format lets you change needles quickly without reanchoring, saving time between steps. Predictable performance: Needle groupings are built for stable grouping and reliable ink delivery for both fine lines and broader shading. Singleuse convenience: Disposable cartridges remove the need for reassembling needle bars, keeping procedures efficient and straightforward. Broad compatibility: Designed for use with standard cartridgestyle tattoo machines and grips that accept plugin cartridges. Specifications Quantity: 20 cartridges per pack Needle types: Round Liner (RL) and Round Magnum (RM) Configurations included: 5RM and 7RM Needle size: 12# Intended use: Cartridge tattoo machines Practical applications Fine line work and detailing: Use the round liner cartridges for crisp outlines, lettering, and detailed elements that require controlled needle grouping. Shading and color packing: Use the round magnum cartridges for smooth shading, gradients, and efficient color saturation across larger areas. Multistep sessions: Keep multiple cartridge sizes on hand to switch between lining and shading quickly during portrait, traditional, and illustrative work. Why professionals choose this type of cartridge Simplified workflow: Quick, tool cartridge changes keep sessions moving and reduce downtime. Versatile pack: Mixed configurations cover the most commonly used groupings so you have the right cartridge for both precision and coverage. Consistency: Preassembled cartridges maintain uniform needle spacing and alignment for predictable results across tattoos. What to expect in use Smooth insertion into compatible cartridge grips Stable needle groupings suitable for precise lines and even shading Immediate readiness straight from the pack for singlesession use Notes For use only with cartridgestyle tattoo machines and compatible grips. Singleuse disposable cartridges. Dispose of used cartridges according to local regulations and clinic procedures.