This 200mm extra heavy duty lockable castors is made of a heavy duty pressed steel zinc plated, housing a polyurethane wheel mounted on an aluminium centre. This 200mm polyurethane castor wheel runs on ball journal bearings, making the heavier loads easier to move. The foot operated wheel brake simultaneously brakes both the swivel castor head and the wheel. These lockable castors are suitable for a range of heavy duty applications, carrying loads 544kg per caster wheel. Overall height 240mm, 4 x M10 Bolt Fixing Plate for easy attachment.