This is a 26g Digital servo from DYS, it is a godd choice for T-Rex 500 swash servos.
Also very good for tailservo on mini Titan or T-rex 450 in combination with GY401 gyro.
High Speed Digital Servo with 21mm diameter round horn,39mm diameter four-point horn, 32mm diameter six-point horn, mounting hardware
* Dimensions:L35.5mm x W15mm x H28.6mm
* Weight: 26g
* Torque 4.8v 2 kg-cm
* Operating Speed: 4.8v .08 sec/60°
* Lead Length:200mm