What is claimed is the ornamental design for a hypotube hub, as shown and described.
FIG. 1 is a top, front, right side view of the hypotube hub showing my new design;
FIG. 2 is a front elevational view, the rear being a mirror image thereof;
FIG. 3 is a right side elevational view, the left side being a mirror image thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The dash dot lines immediately adjacent to the claimed areas in FIG. 4 represent the boundaries of the claimed design. The dashed lines in the figures illustrate the portions of the design that form no part of the claimed design. None of the broken lines form any part of the claimed design.