Uni-ball Uni Compo Fineliner, 0.3 mm, Ultra-Fine Plastic Tip, Waterproof Ink, Smooth Flow, Ideal for Writing & Drawing, Green – Box of 12

Tip size: 0.3 mm; tip type: plastic needle point; ink: waterproof pigment with quick-dry properties; color: green; packaging: box of 12; designed for smooth, consistent ink flow without skips.

Ideal for indexing, labeling, drawing precise boxes and form fields, annotating plans and spreadsheets, making neat notes in planners, and any task requiring fine, legible lines.

Hold the pen at a comfortable angle (around 30–45 degrees) and use light, steady strokes to prevent line skips. Cap the pen when not in use to preserve the ink and prevent drying. Test on scrap paper if you’re switching papers.

Smooth or standard office papers work well, including planner sheets and label stock. For very rough or highly porous papers, the line may be slightly less crisp or require a gentler touch.

Yes. The pigment ink is waterproof and designed to resist smearing and fading over time, helping notes stay legible even when exposed to moisture or handling.

It is designed for everyday writing and drawing use. As with any ink pen, avoid contact with eyes and skin for extended periods and keep out of reach of small children. Always follow local safety guidelines for classroom or workplace use.

The 0.3 mm tip provides ultra-fine, precise lines, and the waterproof, quick-drying pigment ink offers reliable performance for labeling and drafting. The green 12-pack provides ample quantity for color-coding and repetitive tasks, making it cost-effective for frequent use.

If you’re choosing within the Uni-ball Compo line, this 0.3 mm green model emphasizes ultra-fine precision with waterproof ink, ideal for neat indexing and diagrams. For alternatives within the same brand on Fepy, you can consider: - Uni-ball Compo Fineliner 0.3 mm Black: https://fepy.com/product/uni-ball-compo-fineliner-0-3-mm-black-box-12 - Uni-ball Compo Fineliner 0.4 mm Green: https://fepy.com/product/uni-ball-compo-fineliner-0-4-mm-green-box-12 - Uni-ball Compo Fineliner 0.3 mm Blue: https://fepy.com/product/uni-ball-compo-fineliner-0-3-mm-blue-box-12 These offer slightly different tip sizes or color options while keeping the same core benefits of precision and quick-dry, waterproof ink.

Yes. The 0.3 mm tip provides crisp, accurate lines that are well-suited for diagrams, schematics, technical drawings, and grid-based layouts in spreadsheets and plans.

Keep the cap securely closed when not in use and store the pen horizontally or upright with the cap on. This helps prevent the tip from drying out and maintains consistent ink flow over time.