Package contents 20 pieces of screw thread cartridge needles Specification: 0.25 mm tip diameter, 1P / 1RL singleneedle configuration Why choose these cartridge needles Precision lines and detail: The 0.25 mm singleneedle configuration is designed for very fine lining and detailed work, giving improved control on small strokes and intricate designs. Secure, consistent fit: Screw thread connection helps keep the cartridge stable during use for repeatable alignment and minimized wobble. Reliable performance: Precision machining of the cartridge components promotes smooth needle movement for consistent results across the pack. Readytouse pack: 20 identical cartridges supply a consistent set of needles for multiple sessions or routine replacement. Key attributes Function: Singleneedle liner cartridges for precise lining and detail work. Configuration: 1P / 1RL indicating a onepoint single round liner. Size: 0.25 mm tip diameter for ultrafine lines and tight detail control. Connection: Screw thread cartridge for secure attachment and stable operation. Quantity: Pack of 20 cartridges for repeatable performance and convenience. Practical use scenarios Fineline tattooing: Ideal for artists working on small script, singleneedle portraits, or delicate ornamental lines where precision is critical. Cosmetic micropigmentation with cartridgecompatible devices: Suitable for detailed eyeliner, lip lining, or touchups when used with compatible screwthread cartridge pens. Precision touchups and lettering: Use for sharpening edges, touching up faded lines, and working on small lettering where a single fine needle provides better control. Compatibility and handling Designed for use with devices that accept screwthread cartridge needles and standard cartridge housings. Follow the device manufacturer recommendations for installation and use. Singleneedle cartridges are intended for precise, controlled work and should be handled according to professional practice. This pack delivers a consistent set of 0.25 mm 1P / 1RL screw thread cartridge needles for artists who require fineline accuracy and a secure cartridge connection.