All sizes are fitted with a Friction Turntable plate assembly. Ball Bearing Turntable Plate assembly is available on all models - please call for details Both metal & plywood sided units have removable hinged sides & fixed ends A 50 x 50mm, 910mm high wire mesh superstructure is available for trucks without sides & ends, please call for details A 500 / 1000mm high tubular steel superstructure is also available, please call for details Please Note: When purchasing product code ET709A as an item on its own it is subject to an additional carriage charge - please call for details.