FIG. 1 is a front perspective view of our design;
FIG. 2 is a front elevational view of FIG. 1;
FIG. 3 is a front perspective view of a second embodiment of our design;
FIG. 4 is a front elevational view of FIG. 3;
FIG. 5 is a cross-sectional view taken along the line 5-5 of FIG. 4, with the cross-section through FIG. 2 being the same; and,
FIG. 6 is an enlarged portion of FIG. 5.