Check the listing for details. GRAINGER APPROVED 2G047 Plate Caster,Rigid,Polyurethane,4 1/4"H 2G047. Condition: New. Listed at 15.67 USD. Rigid, Plate Caster, Load Rating 250 lb, Swivel Lock Type No Lock Included, Wheel Dia. 3 in, Wheel Width 1 1/4 in, Wheel/Tread Material Polyurethane, Wheel Core Material Polyolefin, Non-Marking Yes, Number of Wheels 1, Caster Brake Type No Brake, Tread Shape Standard Debris-resistant light-duty standard plate casters each have a thread guard that prevents thread and debris from getting into the caster's axle and damaging or contaminating it. This helps extend the life of the casters when they're used in dusty or dirty environments. They are suitable for transporting relatively light loads along smooth, flat surfaces in applications where they won't encounter shock loading, such as laundry rooms, textile factories, offices, retail stores, schools, and government buildings. The casters attac.