The ornamental design for the air abrasion hand piece, as shown and described.
FIG. 1 is a perspective view of the air abrasion hand piece showing the new
design;
FIG. 2 is a top view thereof, the hose and tip to which the sign is
normally attached being shown in dashed lines for reference purposes only
and forming no part of the claimed design;
FIG. 3 is a side view thereof, the hose to which the sign is normally
attached being shown in dashed lines for reference purposes only and
forming no part of the claimed design; and,