These extra heavy-duty rubber castors boast a carrying capacity of 300kgs each. Made of a heavy-duty pressed zinc plated steel, housing a 5" (125mm) solid rubber wheel mounted on a robust aluminium centre. This swivel castor wheel runs on ball journal bearings, making the heavier loads easier to move. The castors can come in multiple variants including; fixed, swivel, locking swivel, directional locked and leading braked.