This medium-duty, Performa-plated, swivel caster has a load rating of 500 pounds and a wheel five inches in diameter and two inches wide. Install this grey zinc caster firmly with 3/8-inch mounting bolts with its mounting plate of 4 x 4 1/2 inches, with outside bolt hole spacing 3 x 3 5/8 inches. When needed, use replacement wheel 5-5-929.