Futaba #FUTS3107. This is the S3107 Micro Servo from Futaba. This servo is used for R/C Park Flyer airplanes. This servo can produce high-current draw from your batteries. If using NiMH or LiPo batteries, make sure they are capable of delivering sufficient amps.
Hitec #HRC31225S. This is the Hitec/RCD #31225S HS-225BB Mighty Mini Ball Bearing Servo with Futaba J, Hitec/JR/Airtronics Z style connector. Connector is compatible with all modern receivers and wiring accessories.