This Vacuum Pump Port 2 Tubing is used to draw sample solution from the waste valve of the HTS system (Port 2) into the vacuum pump. It's comprised of 2 red polypropylene nuts attached to 1/8'' OD, 1.5 mm I.D. tubing. This tubing is designed for use with the PerkinElmer High Throughput System in NexION 1000/2000 series instruments.