Cavity insert for a golf iron head

FIG. 1 is a perspective view of a cavity insert for a golf iron head showing my new design;

FIG. 2 is an end view of the cavity insert shown in FIG. 1;

FIG. 3 is a rear elevational view of the cavity insert shown in FIG. 1; and,

FIG. 4 is a top view of the cavity insert shown in FIG. 1.

The broken line showing of a golf iron head is for illustrative purposes only and forms no part of the claimed design.