Uni-ball Uni Pin Fineliners, 0.05mm, Ultra-Micro Lines, Pigment Ink, Comfortable Grip, Ideal for Technical Wrting & Drawing - Black

Line width: 0.05 mm; ink: waterproof pigment; tip: metal-clad needle point; cap: snap-cap; color: black; features: quick-setting ink to reduce smearing during layered drawing and notes; designed for durability on guides and templates.

Yes. The metal sleeve resists wear when used with rulers and stencils, providing crisp, consistent lines along guides and grids without excessive tip wobble.

The 0.05mm model yields finer lines ideal for dense diagrams and micro-labels, while 0.1mm and 0.2mm variants produce thicker lines better suited for bolder emphasis and larger diagrams. For reference, you can explore the 0.1mm and 0.2mm options here: - 0.1mm variant: https://fepy.com/product/uni-pin-mi-pin200-010-bk-1 - 0.2mm variant: https://fepy.com/product/uni-pin-mi-pin200-020-bk-1

Ideal for technical drawings, micro-labels, precise hatch shading, architectural diagrams, schematic scribbles, and any project requiring the finest possible line weight with clean, scannable results.

Cap the pen securely after use and store it in a cool, dry place away from heat. The snap-cap design helps minimize drying between sessions, and keeping it capped when not in use is the best practice for preserving tip performance.

Yes. The pigment ink is waterproof and fade-resistant, which helps maintain line integrity over time and supports clean scanning of your drawings and notes.

As with any drawing instrument, avoid ingesting ink and keep out of reach of small children. Use on appropriate paper surfaces and store capped to prevent accidental leakage or drying.

If your work demands ultra-fine, archival-quality lines, the 0.05mm Uni Pin offers precise control and durable pigment ink, which can provide better longevity and cleaner scans for technical work. Value improves with frequency of use and the need for the smallest line work.

It performs best on smooth or coated drawing papers where ultra-fine lines stay crisp. On highly absorbent or rough papers, some spreading or feathering may occur, so testing on a sample sheet is advisable for critical work.

Choose 0.05mm for the finest, most densely plotted lines and micro-detail work. If you need stronger line weight for legibility or larger diagrams, consider the 0.1mm or 0.2mm options to achieve bolder strokes with less zoom on the page.