6' X 2' Polyurethane Casters 2 Rigi 2 Swivel No Marking Flexibly 360swivel 2 Rigid & 2 Swivel Casters High Quality Polyurethane Wheels Large Load Capacity Thickened Steel Plate Bracket Easy To Install Wide Application Gross Weight: 15 kg/33 lb,Brake Type: Side Lock Brake,Load Capacity: 1000 lb each,Top Plate Size: 4.5 x 4 x 0.2 inch,Material: Polyurethane + Steel,Wheel Diameter: 6 inch,Wheel Width: 2 inch,Package Size: 13 x 10 x 8 inch