This Capillary Tubing connects the BSM to the inject valve of the nanoACQUITY UPLC in the Direct Injection Configuration and the Single Pump Trapping Configuration. It also connects the Trap Valve with the MM union on the nanoACQUITY UPLC in the Dual Pump Trapping Configuration and the 2D Configuration. To see the Fluidic Configurations for the nanoACQUITY UPLC, go to the Url Link below, under Systems select nanoACQUITY, click on the Waters Graphical Part Locator, and then choose Fluidic Configurations on the right side of the page. There will be the six different configurations of the nanoACQUITY that you can click on individually to see a larger image. There will also be a parts list for that specific configuration on the right side of the page. This part number was originally p/n 430001564and then was changed to the new part number, p/n 430002242.