US D449592 S1
FIG. 1 is a front perspective view of a stereophone ear plug insert showing our new design;
FIG. 2 is a side elevational view thereof, with the opposite side being a mirror image;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom view thereof; and,
FIG. 5 is a front view thereof.
The broken lines shown in all figures are for illustrative environmental purposes only and form no part of the claimed design.