This is an injection-plastic jet aircraft model kit.
From the manufacturer:
The Zlin 26, low-winged monoplane of mixed construction, had some problems with glued wooden wings caused by poor-quality glue. Chief designer Ing Tomas projected new, all-metal wing and tailplanes. The first flight of the new model, the Zlin 126 Trener II, was realized in September 1953.
This kit is molded in grey and clear plastic and includes decals for two marking schemes.