Part of a Hair Brush

FIG. 1 is an upper front perspective view of a part of a hair brush illustrating our ornamental design;

FIG. 2 is an upper rear perspective view thereof;

FIG. 3 is a lower front perspective view thereof;

FIG. 4 is a lower rear perspective thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a right-side elevation view thereof, the left-side elevation being a mirror image;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

In the drawings, the broken lines are for the purpose of illustrating portions of the part of a hair brush that forms no part of the claimed design.