US D639427 S1
The ornamental design for stethoscope tubing, as shown and described.
FIG. 1 is a front view of stethoscope tubing showing our new design;
FIG. 2 is a right side view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof; and,
FIG. 6 is a rear view thereof.
The broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.
FIGS. 2-5 are shown separate from the environment to show aspects of the design that are not apparent in the other views.