This felt-tipped pen features a rich oil-based ink that can be used on unusual surfaces like plastic, glass or fabric, as well as paper. The fine lines that the Uni Pin Pen produces are perfect for technical drawing, and the pen can write for about 2000 meters before running out of ink. The ink is dye-based and acid-free.

Body Color:Gray

Body Material:Plastic

Clip Material:Metal

Ink Characteristics: Acid-Free, Multi-Surface (Glass, Metal, Plastic)

Ink Composition:Dye-Based, Oil-Based

Ink Refillable: No

Tip Material:Felt

Tip Replaceable:No