This is the third stage of the Ariane 4, in its final evolution (H10-3). This replaces the third stage from the 1/125 Heller kit.<br /><br />Details added compared to the Heller kit item:<br /><br /><ul><li>heat shield tiles</li><li>conduits</li><li>RCS</li><li>ullage motors</li></ul>
The scale marked 1/128 fits the Heller kit, the 1/144 item is experimental (I'm not sure it will fit the Revell Ariane 4 kit).
For more information, see
http://acme-engineering.nl/esa.html