FIG. 1 is a perspective view of the front, bottom and right side of a slider for slide fastener showing my new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a right side view thereof, the left side view being mirror image thereof; FIG. 5 is a top plan view thereof; and, FIG. 6 is a bottom view thereof.