US D588324 S1
The ornamental design for conveyor roller, as shown and described.
FIG. 1 is a perspective view of conveyor roller showing my new design;
FIG. 2 is a front elevational view thereof, the front, rear, top, and bottom elevational views being identical; and,
FIG. 3 is a left side elevational view thereof, the left and right side elevational views being identical.
The conveyor roller is shown cut-away in FIGS. 1 and 2 to indicate no specific length.