The 150mm Rebound Rubber Wheel Richmond Castor is a part of the series of heavy industrial castors. The wheel is supplied with Ball Bearings and the wheel diameter is 150mm (6″). The max load of this heavy industrial castor is 225kg. This castor is also fitted with a swivel lock. Swivel castors such as this one allow full swivel rotation of the wheel. Rebound rubber wheels are non marking however they have a higher rolling resistance than some other wheel types