Hi Frederick,
The belt is called GT2, in various sizes.
sdp-si.com has CAD in multiple formats.
It is simple to register to get access to the CAD drawings.

One STEP import to MoI3 shows two teeth on a belt.

I think I had these belts on my CNC router...

- Brian

https://sdp-si.com/products/timing-belts/gt2.php#