The ornamental design for a metalsection, as shown and described.
FIG. 1 illustrates a plan view of a metal section according to the invention.
FIG. 2 illustrates a perspective view of the metal section illustrated in FIG. 1
FIG. 3 illustrates a front view of the metal section illustrated in FIG. 1 where the width can be any length. A rear view of the metal section illustrated in FIG. 1 would be identical to the front view; and,
FIG. 4 illustrates a right side view of the metal section illustrated in FIG. 1. A left side view of the metal section illustrated in FIG. 1 would be identical to the right side view.
The broken lines shown indicate that the claimed design is indefinite in length.