UK, in the footnote of Slide 18 of the presentation (reproduced below) it references the websites of Bosch and Toyoyta as sources of information. More specifically, in footnote 1, it references the 125 kW Powecell Pstack fuel cell by Bosch used by Nikola trucks, and the 128 kW Synohyteck Toyota Mirai fuel cell also used in the Class 8 trucks (two of them per truck), bars labeled 5 and 6, respectively, in the bar chart.