Servo motor and PWM controller LEGO connectors by Geoff_B_UK | Download free STL model | Printables.com
Amazon.com: New Lego Power Functions Servo Motor (88004) : Toys & Games
BrickLink - Part 99498c01 : LEGO Electric, Motor 9V Power Functions Servo with Dark Bluish Gray Bottom [Electric, Motor] - BrickLink Reference Catalog
Lego Power Functions SERVO MOTOR + Rack Kit (technic,gear,crawler,steering,car) | eBay
Lego Technic Power Functions Servo Motor 88004 | eBay
Amazon.com: Build MISINI 27-Piece Set CADA Power Functions Pro, High-Speed L/M/Servo Motor Set (Including Cross Shaft), 2.4G Fast Charge Remote Control Battery, Compatible with Lego Technology Cars : Toys & Games
Plastic Omni Wheel for LEGO NXT and Servo Motor – 14135 – Oz Robotics