FIG. 1 is a perspective view showing my new design;

FIG. 2 is a front elevation view thereof, showing a portion of the rail, and the design of the rail is the same along its entire length;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side elevation view thereof, showing an article which is 21 cm high and 3.6 cm wide. The opposite side is substantially a mirror image of that shown; and,

FIG. 7 is a cross-sectional view taken along line 7--7 in FIG. 2.