The ornamental design for an endsurface of a set of slats for a glider, as shown and described.
FIG. 1 is a perspective view of an end surface of a set of slats for a
glider, showing my new design, the broken lines are for environmental
purposes only and form no part of the claimed design.
FIG. 2 is a side elevational view thereof; and,
FIG. 3 is a side elevational view thereof, similar to FIG. 2 but enlarged.