FIG. 1 is a perspective view of a cap for a block;

FIG. 2 is a front view of the cap for a block illustrated in FIG. 1;

FIG. 3 is a rear view of the cap for a block illustrated in FIG. 1;

FIG. 4 is a left side view of the cap for a block illustrated in FIG. 1;

FIG. 5 is a right side view of the cap for a block illustrated in FIG. 1;

FIG. 6 is a top view of the cap for a block illustrated in FIG. 1; and,

FIG. 7 is a bottom view of the cap for a block illustrated in FIG. 1.

The portion of the article depicted in broken lines is for illustrative purposes only and forms no part of the claimed design.