A parametric 5mm pitch HTD timing belt pulley made in Autodesk Inventor. If you have Inventor, you can download the IPT from here and change the "Grooves" parameter to get whatever number of teeth you want. There is also a "Height" parameter for the width of the belt. If not, I have included STL and STEP files for some common belt widths and numbers of teeth.
The author marked this model as their own original creation.