This is a pre-owned 2.5" diameter SubDriver, complete with:
 
MTroniiks ESC
SAS Ballast
Twin servo outputs
Air pump with PSC controller
 
Whle the ballast tank may be slightly undersized for them, this cylinder will be able to power twin shaft boats such as the Revell Gato, Revell Type IX and Arkmodel Type VII. 
 
Sold as-is and where is with no warranty implied or offered. A great place to pick up a cylinder at a HUGE discount! Move fast!
 
Includes shipping in the USA. International orders will be subject to a shipping surcharge.