Well I dug out my plastic HF calipers and did 5 measurements on each the cross section (CS), ID, and OD. To get an average. The assumption is metric.
My results: 2.26 x 19.46 x 24.26mm
Calipers are =/- 0.05 and the zero offset doesn't seem that significant but it is HF after all.
I took a...