Amazon.co.jp: 4Pcs Geekservo Servo 360° 2KG Red Motor Red Motor with Programmable Dual Output Shaft Servo (Compatible with Lego Micro:bit) DIY Technology Building Bricks : Toys & Games
RC Mini-Servo (9 grams) with mounting Kit for NXT/Ev3
Servo Kit 360' — スイッチサイエンス
Plastic Micro Servo Adapter for LEGO Cross - 16mm long : ID 4252 : $0.75 : Adafruit Industries, Unique & fun DIY electronics and kits