My dad spent his entire career in the pneumatic tube industry, and I’ve got one of the New York City postal office carriers he referred to, in addition to some 2 1/4" brass carriers used in JC Penney’s, and all sorts of other odd ball systems. What most people see are 4" systems, as that is the most common size of carrier for banks and hospitals.
The system in the video is a 100mm system (if it’s from Germany), and really poorly hung tube, too. As NZ is an earthquake zone they need sway bracing.
