This is a brand new, unused example of an early Nautilus Drydocks 2.5" SubDriver. This is being offered on behalf of a customer on a consignment basis and is here at the shop, in stock and ready to ship!
 
Features: 
2.5" diameter
Approx. 21" overall length
Approx 6" ballast tank suitable for most medium sized subs
Brushless propulstion
Two forward and two aft servo outputs
High quality cup seals for drive shaft and linkages
Air pump ballast system with gas backup