Shock Absorbing Rigid Plate Caster with 8" x 2-1/2" Polyurethane Wheel 2000# Cap 8" x 2-1/2" Wheel 2000# Cap Plate (One) Caster 75-SP825-R Plate (43) 5" x 5-1/2" Square Plate (2000# Cap.) (Black) (One)