This is the Futaba S3114 Micro High Torque Servo. / / FEATURES: Ideal for electric planes and small electric helis / Nylon gears / One year warranty / / INCLUDES: Futaba S3114 Micro High Torque Servo / One .91"" x .64"" (23mmx16mm) 4 arm servo horn (comes pre-installed) / One 1.33"" x 1.33"" (34mmx34mm) 4 arm servo horn / / REQUIRES: Installing in aircraft and connecting to receiver / / SPECS: 6V 4.8V / Torque: 23.5 oz-in (1.7 kg-cm) 20.8 oz-in (1.5 kg-cm) / Speed: .09 sec/60° .10 sec/60° / Dimensions: .86 x .43 x .78"" (21.8 x 11 x 19.8mm) / Weight: .27oz (7.8g) / Lead Length: 6.5"" (165mm) / Output Spline Diameter: 4mm