FIG. 1 is a front isometric view of the shim of the subject invention; FIG. 2 is a right side view of the shim of the subject invention where the left side is identical to the right side; FIG. 3 is a top plan view of the shim of the subject invention where the bottom is identical to the top; FIG. 4 is a front end view of the shim of the subject invention; and, FIG. 5 is a rear end view of the shim of the subject invention.