These 125mm extra heavy duty fixed castors, overall height 164mm, load capacity 500kgs each, 4 X M10 Bolt fixing plate. Heavy duty fixed castors are made of a heavy duty pressed steel zinc plated, housing a polyurethane wheel mounted on an aluminium centre. This fixed castor wheel runs on ball journal bearings, making the heavier loads easier to move. These castors are suitable for a range of heavy duty applications. Combine 4 castors to take 1.5tonne castors load capacity. Electro conductive version available, please contact the sales team.