These are some greebles for your sci-fi machinery, or spaceship.
You can spread them as particles, or arrays, stretched along a curve, or spline etc.
Feel free to combine the various parts, antennas, heat-sinks as you like.
The antennas are separate objects
Origins of these objects are in their bottom centres.
You can find the individual polycounts for each object in the thumbnails.
Unwrapping is only done via an automatic algorithm, so it is not the best, but it is non-overlapping.
That strange ball is included as a bonus model in the *.blend file. That space gun is a separate model of mine.
To limit compatibility problems, two versions of the *.obj format are included. Both were exported via a different program.