"FS90R continuous servo motor with wheelVoltage supply: 4.6 - 6 V DCRevolutions: 110 - 130 rpmPeak torque: 1.5 kg/cmWheel diameter: 60 mmWheel width: 8 mmMotor dimensions: 32.6 x 32 x 12.5 mmIncluded in delivery: Motor, wheel, adapter set"