The non-toxic ink of each Felt Tip Marker is waterproof and smear and fade-resistant, for archival quality.
Durable tip for precise writing in a clean room environment, WHERE THE PREVENTION OF CHEMICAL EXPORTATION AND PARTICLE CONTAMINATION IS CRITICAL.
The pen body is manufactured from a molded, single piece, extruded high density, polyethylene. The cap is a high density polyethylene which has been molded.