Uni Dermatograph Oil-Based Pencil

The Uni Dermatograph pencils are?similar to grease pencils.?They are perfect for writing on a variety of surfaces such as glass, metal, plastics, ceramic, vinyl, cellophane, and marks can be removed from any non-porous smooth surface. You can easliy remove its paper wrapping by pulling the inside thread, which will expose more of its lead.?

Dimensions:?Length?17.5 cm, Diameter 8 mm.