JX Servo PDI-6121MG 20kg Large Torque 120 Degree Digital Coreless Servo For RC Models   Description:   Dead band: 1μs   Maximum Pulse Width: 900-2100us Maximum Angle: 120     Working frequence: 1520μs \/ 330hz Motor: coreless motor Operating Speed (4.8V): 0.152sec\/60   Operating Speed (6V): 0.131sec\/60  Stall Torque (4.8V): 17.21 kg.cm (239.03oz\/in) Stall Torque (6V): 21.06kg.cm (292.46oz\/in) Dimensions: 40.5X20.5X36.5mm \/1.59X0.80X1.43in Weight: 61 g (2.15oz) Connector Wire Length: JR  265 mm (10.43in) Bearing: 2BB   Fearture:   High-performance standard digital servo High-precision metal gear High-quality brushed motor Dual ball bearing   Package included:   1x JX PDI-6121MG Servo