FIG. 1 is a perspective view of stool seat showing my design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof; and,
FIG. 5 is a left side elevation view thereof, the right side elevation view thereof being a mirror image.
The bottom surface of the article not shown in the drawing or described in the specification forms no part of the claimed design.
The broken line showing of a stool seat support in FIG. 1 of the drawing is for illustrative purposes only and forms no part of the claimed design.