This is the HS-6635HB Digital Standard High-Torque Servo from Hitec. The HS-6635HB represents the ultimate compromise between performance and price. If you are looking to get the most out of your next project, but price is a consideration, be sure to check out this Karbonite digital, high torque servo. The Karbonite gears offer greater durability than your typical plastic geared servos.
Transit time: 0.18 sec/ 60 deg. @ 4.8V (0.15 sec/deg @ 6V)
Torque: 69.4 oz/in @ 4.8V (83.3 oz/in @ 6V)
Weight: 52.0g (1.83 oz)
Length: 39.8mm (1.56")
Width: 19.8mm (0.77")
Height: 38.8mm (1.52")