W5513 6T JX 6 giri 10kg servo per verricello a vela con ingranaggio in metallo Standard per motore DC per Yacht RC 0.09sec SW5513 6MA|sail winch| servo servometal gear servo - AliExpress
DF95 Original sail winch servo
Modelcraft Sail winch servo RS-22 YMB Digital servo Gear box material: Metal Connector system: JR | Conrad.com
The HS-785HB Sail Winch Multi-Rotation Servo Explained - YouTube