and the tip can also be changed

Weight: 198g

The barrel is solid aluminum rather than plastic

You control the flow of ink by pumping the tip against your surface

and clean sketch outlining

uni pin fine line pen light grey Size:0.1 and the tip can alsoThe Uni Pin Fine Line Light Grey lays down a soft, cool grey rather than a strong dark tone, suited to faint shading, base sketch contours, or subtle drop shadows behind darker title text where a full black or dark grey line would feel too heavy. The tip is a steel guided polyacetal core for a steady, consistent line. The ink is uni ball's "Super Ink" pigment formula, archival and waterproof once dry, so it can sit underneath a watercolor glaze