This 100mm braked castors is made of a zinc plated housing which ensures the castors is robust enough and suitable for a variety of environments. The swiveling castors, with the non marking blue rubber wheel and a brake is suitable for trolleys, equipment and general purposes. The non marking blue rubber wheel with roller bearings means the castor is quiet to move, will not mark the floor and will carry significant loads of 160kg per caster wheel. The foot operated wheel brake simultaneously brakes both the swivel castor head and the wheel.