Savox SC-0252MG Metal Gear Standard Digital Servo Dimensions(mm): 40.7X19.6X39.4, Weight(g): 49.0 Speed(@4.8/6.0V sec/60): .23/.19 Torque(@4.8/6.0V oz-in): 100.0/145.8 Gear: Metal, 25 Tooth Spline, Bearing: 2BB, Case: Plastic 1 Year Warranty Against Manufacturing Defect