The RAW 500 Brass Edition is: FULLY PROGRAMMABLE High Torque High Speed Brushless Servo IP67 Rated WATERPROOF: 7 Point SealsMagnetic Angle SensorPulse Width Modulation ControlFully Programmable w/ REEFS SoftwareREEFS LINK required for Programming Voltage 4.8V - 8.4V / Bearing Type: 2 Ball BearingsInternal: Steel Gears / CNC Brass Casing with ULTRA FinishWeight: 5.2oz / 145.2GDimension: 1.57 x .79 x 1.5 (LWH)Torque: 450oz (32.4kg)@ 6v/ 500oz (36kg)@7.4v/ 565oz (40.7kg)@8.4vSpeed: .11sec @6v/.095sec @7.4v/.08sec @8.4vSpline: 25T / Dead Band Width: 2¦ÌsFor added performance, we recommend the REEFS 8.4V EZ-BEC Unload Current: 320mA @ 6.0V / 360mA @ 7.4V / 400mA @ 8.4V Loading Current: 4000mA @ 6.0V / 4300mA @ 7.4V / 4600mA @ 8.4V Item# REEFS159 WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.