Standard Single Servo for use with many modelling applications. The HS-311 sport servo provides the novice modeler all the performance and reliability you would expect to find in a more expensive servo. Combined with precise resin gears and SMT circuitry, the HS-311 represents a remarkable value in today's R/C market. Specifications Motor Type: 3 Pole Bearing Type: None Speed (4.8V/6.0V): 0.19 / 0.15 sec @ 60 deg. Torque oz./in. (4.8V/6.0V): 42 / 51 Torque kg./cm. (4.8V/6.0V): 3.0 / 3.7 Size in Inches: 1.57 x 0.78 x 1.43 Size in Millimeters: 39.88 x 19.81 x 36.32 Weight ounces: 1.51 Weight grams: 42.81