With this conversion set you can build Type IX submarines with older equipment – with which these submarines achieved their greatest triumphs. Both the 105 mm anti-ship cannon and the 20 mm anti-aircraft Flak Vierling have turner metal barrels. The control wheels and and other thin parts can be found on the photo-etched fret. Both cannons can be used not only for Type IX submarines, but also for ship decks and dioramas.