SM-S4315M 2BB (Dual Ball Bearing) Metal Gear High Torque Servo. High quality servo to meet the needs of many radio control models or other special projects. Smooth Operation. Uniform Dimensions. Brought to you by Atomik RC your one stop online RC Shop. Type: Standard. Operating Speed: 0.21sec (4.8V) | 0.17sec (6.0V). Stall Torque: 4.8V: (180.54oz/in ) | 6.0V: (209.7oz/in). Input: 4.8 - 6.0V. Length: 1.63 in (41.3mm). Height: 1.57 in (40mm). Width/Diameter: 0.81 in (20.7mm). Weight: 61g (2.15oz).

From the Manufacturer

High Quality Spring RC SM-S4315M Dual Ball Bearing Metal Gear High Torque Standard Size Servo. Features Smooth Operation and Uniform Dimensions.