VESDA-E VEA microbore tubes are custom made, high-quality plenum rated flame retardant polyethylene tubes. They have superior stress crack resistance for reliable long-term performance. They are lightweight and flexible for easy handling and installation and marked with a white ink numbering system over the full length of the tubing. The numbering system includes individual unique identification of each tube and distance marking at regular intervals making them very efficient to install and keep clean installation records.