Savox SH-0255MG Micro Metal Gear Digital Servo Dimensions(mm): 22.8X12.0X29.4, Weight(g): 15.8 Speed(@4.8/6.0V sec/60): .16/.13 Torque(@4.8/6.0V oz-in): 43.1/54.2 Gear: Metal, Bearing: 1BB, Case: Aluminum, 21 Tooth Spline 1 Year Warranty Against Manufacturing Defect