The kit provides the option to build one of 4 different versions, the S300 5P85SE, S400 5P85TE2, S300 5P85S and S300 5P85D. The S300 missile system (NATO : SA-10 Grumble) is a Russian long range surface-to-air missile system. The S400 missile system (NATO : SA-21 Growler) is an improved S300. The S300 and S400 are mounted on the 5P85 launch vehicles. Includes rubber tyres, photo-etched parts and decals.