Maneuvering in the dock area can be challenging, but Lewmars tunnel thrusters simplify docking with ease. The propeller design, a testament to Lewmars extensive experience in custom thruster solutions, delivers even thrust in both directions, ensuring superior control and maneuverability for seamless docking.• Ideal for boats 40' to 55'• Tunnel size 185 mm• High performance single 5-blade propeller gives equal thrust in both directions• No reservoir installation required, no leaks, and minimal maintenance needed | Lewmar 185TT 5.0KW Tunnel Thruster - 12V #590010