These 160mm extra heavy duty rubber castors able to carry loads 400kgs each, combine 4 castors to carry over 1 tonne! Overall height 200mm, 4 x M10 Bolt Fixing Plate, these robust castors are made of a heavy duty pressed steel zinc plated, housing a 6 ( 160mm ) solid rubber wheel mounted on an aluminum centre. This swiveling castor wheel runs on ball journal bearings, making the heavier loads easier to move. These castors are suitable for a range of heavy industrial applications. 160mm Heavy Duty Swivel Castors Black Rubber Wheel