Joints are inner, 2 mm stopcocks, fitted disks.

Tube has outer joint on top and inner on bottom with two - 2 mm high pressure stopcocks.

Center and side neck are outer joints of the same size, and sidearm and bottom joint are inner joints of the same size.

Center and side neck are outer joints of the same size, and sidearm and bottom joint are inner joints of the same size, but with the addition of a PTFE stopcock below the fritted disk.