4PCS Set Swivel Heavy Duty Machine Levelling Castors Wheels 500kg/1000kg UK
Total load capacity：1000kg / 2204lbs. Single wheel load capacity ：500kg / 1102lbs. 1 set of 4 leveling castors( GD-60S or GD-80S ). It can be used on uneven floors. The weight of the object on the wheel.