Hitec analogue standard servo HS-646WP waterproof IP67 - torque 9.6-11.6 kg - 32646S
Hitec's WP series servos have been designed to be absolutely waterproof, and their exclusive technology is patented.
This line of servos is perfect for underwater projects, boats, submarines, rockcrawlers and all applications where watertightness of the servo is required (IP67 protection)