These 150mm extra heavy duty swivel castors made of a heavy duty pressed steel zinc plated, housing a polyurethane wheel on an aluminium centre. Overall height 200mm, load capacity 700kgs each, 4 x M10 Bolt Fixing Plate for easy attachment. This heavy duty swivelling castor wheel runs on ball journal bearings, making heavier loads easier to move. These heavy duty polyurethane castor wheels are strong and durable, suitable for a range of heavy duty applications. Combine 4 of these castors to carry 2 tonne castors