These 80mm polyurethane castors are made of a zinc plated housing which ensures the castors are robust enough and suitable for a variety of environments. Load Capacity is 150kgs each, overall height 108mm. The swivel caster with a grey polyurethane wheel is strong and durable and suitable for moving machinery and equipment. These castors are easily fixed using the M8 top fixing plate. The polyurethane wheels are not only hardwearing, but are a quiet running castor alternative to nylon castors.