The connectors are made of acrylic sheets and transparent for radiation and x-rays. Those don’t have any metal parts.
As an option, the connectors are available in different color combinations including 100% non-transparent for vusual light black.
The connectors exist in both inch and metric standards. `2x3 is recommended for side-by-side connection of two boards. 2x2 is convenient for connection of four boards in the point of coincidence.
Please refer to our Custom Prototyping section to see some example of the use of standard parts to build custom setups.