This is a resin detail parts set for use with aircraft kits.
From the manufacturer:
This set contains 2 highly detailed AS-34 Kormoran Anti-ship missiles that are carried by German and Italian F-104 Starfighter and Tornado aircraft. The missiles are cast in one piece with only separate fins. The set also contains launcher adaptors, decal sheet with stencils, 20 color photo-etched Remove Before Flight tags, and plain photo-etched fret with small parts.