FIG. 1 is a perspective view of our new design of a handle hub;

FIG. 2 is a top plan view of our new design of the handle hub;

FIG. 3 is a bottom plan view of our new design of the handle hub;

FIG. 4 is a front elevational view of our new design of the handle hub, a rear elevational view thereof being a mirror image of the front elevational view;

FIG. 5 is a right side elevational view of our new design of the handle hub; and,

FIG. 6 is a left side elevational view of our new design of the handle hub.

The broken line representation of a lever handle shown in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.