The ornamental design for a shower head, as shown and described.
1. Shower head
1.1: Perspective
1.2: Front
1.3: Back
1.4: Top
1.5: Bottom
1.6: Left
1.7: Right
1.8: Rear perspective
Materials include metal and synthetic resin; ornamental design for a showerhead for use with a hose; fig. 1.1is a front perspective view of a showerhead; fig. 1.2is a front elevational view of the showerhead shown in fig. 1.1; fig. 1.3is a rear elevational view of the showerhead shown in fig. 1.1; fig. 1.4is a left side view of the showerhead shown in fig. 1.1; fig. 1.5is a right side view of the showerhead shown in fig. 1.1; fig. 1.6is a top view of the showerhead shown in fig. 1.1; fig. 1.7is a bottom view of the showerhead shown in fig. 1.1; fig. 1.8is a rear perspective view of the showerhead.