We claim, the ornamental design for a shelf tower for a syringe pump rack and/or infusion pump rack, as shown and described.
FIG. 1 is a left perspective view of a shelf tower for a syringe pump rack and/or infusion pump rack;
FIG. 2 is a right perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a top view thereof.
The broken lines in the drawings illustrate portions of the shelf tower for a syringe pump rack and/or infusion pump rack which forms no part of the claimed design.