This 125mm braked castors is made of a zinc plated housing which ensures the castor is robust and suitable for a variety of environments. The braked swiveling castors, with the white nylon wheel is strong robust and durable and suitable for moving machinery and equipment. The white nylon wheel castors contains roller bearings making it easier to move whilst maintaining core strength. The foot operated wheel brake on these castors simultaneously brakes both the swivel castor head and the wheel. 125mm Swivel Castor with Brake White Nylon Wheel