The ornamental design for a windowtoprailextrusion, as shown and described.
FIG. 1 is an isometric view of a window top rail extrusion, according to the present disclosure.
FIG. 2 is a top view of the window top rail extrusion of FIG. 1.
FIG. 3 is a bottom view of the window top rail extrusion of FIG. 1.
FIG. 4 is a front view of the window top rail extrusion of FIG. 1.
FIG. 5 is a rear view of the window top rail extrusion of FIG. 1.
FIG. 6 is a left side view of the window top rail extrusion of FIG. 1; and,
FIG. 7 is a right side view of the window top rail extrusion of FIG. 1.
The window top rail extrusion is shown with two parallel dash-dot break lines that represent the bounds of the claim. The appearance of any portion of the article between the break lines forms no part of the claimed design.