The file 'GT2 Timing Belt For EQ3-2 3D Printer Model' is (stl) file type, size is 156.0KB.
Customized this for my rDUINOScope Project using EQ3-2 Equatorial Mount. For both RA & DEC axes. 146mm, 73 teeth GT2 Timing Belt
Link for the motor mount for EQ3-2:https://www.thingiverse.com/thing:4598951