The length of the tapered cylinder shape is displayed between the points at which frame_a and frame_b are attached in the model workspace.
If you connect this shape to the frames of a single component,
a cylinder shape is displayed over the implicit geometry that represents the component in the 3-D workspace.
If you connect this component to the frames of two different modeling components,
the cylinder shape spans multiple components.
If you want to display a cone shape, specify a value of 0 for one of the radius parameters.
The meaning of the four radii parameters is demonstrated in the following figure: