Package Includes: 20pcs 1P 0.50mm Screw Thread Cartridge Needles Key features and benefits Quantity and specification: Pack of 20 cartridge needles, each labeled 1P with a 0.50mm diameter for consistent singlepoint application. Screw thread cartridge design: Secure, threaded connection for quick installation and stable fit on compatible screw thread cartridge devices. Precision for detail work: Singlepoint 1P configuration is suited to fine lines and detailed strokes where controlled placement is required. Predictable sizing: The 0.50mm diameter provides a consistent contact area for repeatable results across multiple cartridges. Ready for professional use: Uniform specification across all 20 pieces simplifies inventory and replacement during projects. Compatibility and function Intended for use with devices that accept screw thread cartridge needles in the 1P 0.50mm format. Verify device compatibility before use. Function: cartridge needles designed to deliver precise singlepoint work through a screw thread connection. Typical applications Cosmetic micropigmentation and detailed cosmetic tattooing where fine line control is needed for work such as eyeliner, lip lining, or precise eyebrow outlines. Touchups and detailed corrections on small areas that require a singlepoint approach. Practice and training on synthetic practice skins or other nonliving surfaces to build technique and consistency. Notes for users Confirm that your device accepts screw thread 1P cartridges with a 0.50mm needle before use. Store cartridges in a clean, dry environment until they are needed. Each pack contains 20 identical 1P 0.50mm screw thread cartridge needles for consistent performance across jobs.