22# cleanroom paper, 8.5x11"-designed for writing, printing & photocopying in clean room environments, where the prevention of chemical exportation and particle contamination is critical Meets all standards for  "Class 10"-ISO Class 4

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…

22# cleanroom paper, 11x17"-designed for writing, printing & photocopying in clean room environments, where the prevention of chemical exportation and particle contamination is critical Meets all standards for  "Class 10"-ISO Class 4