GRP Stern-Thruster - Tunnel Diameter 185mm Combining a VETUS stern thruster with a VETUS bow thruster will provide even greater maneuverability for your boat in locks or harbors. By placing a side-directional thruster in the bow and another one at the transom, everything from docking and sailing away to finding a spot in the lock or marina becomes child’s play! Even the effects of wind and current can be effectively countered.  Installation of a VETUS stern thruster is simple. The electric motor and other electrical components are fitted internally to the transom of the boat. The stern thruster tunnel and the propeller are installed externally on the transom. Note: * The range of seven different stern thruster kits can make 14 different stern thruster models * These kits may also be used with ‘ignition protected’ thrusters and extended-runtime thrusters Specifications: * For Thruster Models: BOW60, BOW75, BOW95, BOW95HYDR, BOWA0651, BOWA0761, BOWA0764, BOWB065, BOWB076, BOWB090, BOWB110, BOWB130 * Internal Tunnel Diameter: 185mm