These are plastic model sets that require assembly and painting. They do not contain paints and glues unless otherwise stated. During the war, the need to produce self-propelled anti-aircraft guns capable of protecting troops against low-flying air attacks became marked. To this end, the hull of the Panzer IV medium tank, the Flakpanzer IV Wirbelwind, was used as a platform to add on a 20 mm Flak 38 quadruple gun system. By the end of 1944 the Wirbelwind was joined by the more powerful Ostwind, which was mounted with a 37 mm Flak 43 anti-aircraft gun. Providing a greater range of fire, the anti-aircraft armament protected by a thick and characteristic shield mounted on an "open-roof" hexagonal turret, the Ostwind could also be effectively deployed against ground targets in close support of troops on the battlefield. The few �Ostwind� that were produced were delivered to the anti-aircraft units of the Panzer Division, and proved very effective on operations.