FIG. 1 is a frontal perspective view thereof; FIG. 2 is a front plan view thereof; FIG. 3 is a cross sectional view thereof, seen along line 3-3 in FIG. 2; FIG. 4 is a rear plan view thereof; FIG. 5 is a top view thereof; FIG. 6 is a bottom view thereof; FIG. 7 is a left side view thereof; and, FIG. 8 is a right side view thereof.