This is a fully assembled and painted model of the famous ALVIN Deep Sea Research Submarine. The hull is empty, ready for your control hardware. 

Hull Features: 
LED lighting in sail and separate floodlights
Posable manipulator arm
Sample basked mounting bracket
Stainless drive shaft with installed universal joint
Rudder linkage
Removable Sail
 
You can view the detailed unboxing of this model on my Weekly Update Video 
 
Due to long-term storage, the upper hull underwent a degree of warping. This was addressed in the video. The new owner could definitely take a few more minutes to tweak the fitment, but it looks great as it is. 

I would not recommend a cylinder to power this model. A control box and separate ballast tank would be better suited.