FIG. 1 is a perspective view of a treatment handpiece showing my design;
FIG. 2 is a right side elevational view thereof with the left side being a mirror image;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.