Richelieu F25830 Tru Guard 4 Inch Polypropylene Rigid Plate Caster

400 series, 4 inch, polypropylene rigid plate caster, 275 pound load capacity, plate size of holes 1.75 inch by 2-15/16 inch, rubber tread on black polypropylene hubs, offers a soft cushioned ride and are quiet, excellent flat spot resistance and is resistant to a broad range of chemicals, acids, solvents and detergents, non-marking, performs well in wet and corrosive conditions, very good floor protection and impact resistance, temperature range 180 and degree Fahrenheit to -40 and degree Fahrenheit, durometer 80a + -5, bulk.