FIG. 1 is a front perspective view thereof; FIG. 2 is a bottom perspective view thereof, FIG. 3 is a top plan view thereof, FIG. 4 is a bottom plan view thereof, FIG. 5 is a first end plan view thereof, FIG. 6 is a second end plan view thereof; and, FIG. 7 is a cross-sectional view along plane 7-7 in FIG. 5.