FIG. 1 is a perspective view of a first embodiment of my new design illustrating a portion of the embodiment in a rolling configuration;
FIG. 2 is a perspective view of the first embodiment in a flat configuration;
FIG. 3 is a top view of the design of FIG. 2;
FIG. 4 is a side view of the design of FIG. 2, the opposite side being a mirror image;
FIG. 5 illustrates an enlarged portion of FIG. 4;
FIG. 6 is a perspective view of a second embodiment of my new design in a flat configuration;
FIG. 7 is a top view of the design of FIG. 6;
FIG. 8 is a side view of the design of FIG. 6, the opposite side being a mirror image;
FIG. 9 illustrates an enlarged portion of FIG. 8;
FIG. 10 is a perspective view of a third embodiment of my new design in a flat configuration;
FIG. 11 is a top view of the design of FIG. 10;
FIG. 12 is a side view of the design of FIG. 10, the opposite side being a mirror image;
FIG. 13 illustrates an enlarged portion of FIG. 12;
FIG. 14 is a perspective view of a fourth embodiment of my new design in a flat configuration;
FIG. 15 is a top view of the design of FIG. 14;
FIG. 16 is a side view of the design of FIG. 14, the opposite side being a mirror image;
FIG. 17 illustrates an enlarged portion of FIG. 16;
FIG. 18 is a perspective view of a fifth embodiment of my new design in a flat configuration;
FIG. 19 is a top view of the design of FIG. 18;
FIG. 20 is a side view of the design of FIG. 18, the opposite side being a mirror image; and,
FIG. 21 illustrates an enlarged portion of FIG. 20.
