Uni-ball Uni Pin Fine Line Pen, 0.1mm, Precision Tip, Smooth Ink, Dark Grey – Pack of 12

0.1mm tip, dark grey ink, smooth ink flow, durable tip, single-piece design, and a pack contains 12 pens.

This is a single-piece pen, designed for long-lasting precision without replaceable nibs.

Ideal for fine-line illustrations, technical drawings, architectural sketches, outlines, and any project requiring precise, thin lines.

It works well on standard drawing and sketch papers. For best results, use on smooth or medium-weight papers; avoid very glossy or highly coated surfaces where ink may not flow as smoothly.

Cap the pen when not in use, store it horizontally or upright, avoid pressing or bending the nib, and keep it away from dirt or moisture to prevent drying or clogging.

Yes, Uni Pin pens are designed for safe art and writing use. The ink is non-toxic and suitable for general creative work. Keep away from eyes and ingestion; not intended for food-contact surfaces.

The 0.1mm version delivers a finer line for ultra-detailed work. The 0.2mm option creates a slightly bolder line, while the 0.3mm version is even more noticeable. See the alternatives here: 0.2mm at https://fepy.com/product/uni-ball-uni-pin-fine-line-pen-0-2mm and 0.3mm at https://fepy.com/product/uni-ball-uni-pin-fine-line-pen-0-3mm.

The pack includes 12 individual Uni-ball Uni Pin Fine Line pens, ready for bulk use on multiple projects.

The ink is formulated for crisp, clean lines. On standard sketch paper it tends to minimize bleeding and feathering, though performance can vary with paper porosity and weight.

Yes. The 0.1mm fine line makes it well-suited for precise, controlled lines when using rulers, templates, or templates for technical drawings.