Black Rubber Wheel With On And Off Break. Use For Heavy Objects. 675.9260 Has 1-7/8" X 2-19/32" Plate Size. 926.0688 Has 2-3/4" X 3-7/8" Plate Size. 888.4264 Has 3-7/64" X 4-1/8" Plate Size. 675.9278 Has 4" X 5-7/64" Plate Size.