This is a Hitec HS-755HB Quarter Scale Servo with Universal Futaba J, Hitec S, JR and Airtronics Z Connector.

FEATURES: Ball bearing Karbonite gears

INCLUDES: One servo Black round servo horn Black long and short double straight servo horn Black long and short single straight servo horn Four servo grommets Four brass eyelets Four S/T servo mounting screws Decals

SPECS: Length: 2.32" (59mm) Width: 1.14" (29mm) Height: 1.96" (50mm) Weight 3.88oz (110g) Operating speed: .28 sec/60 degree at 4.8V Output torque: 152.75 oz-in (11 kg-cm) at 4.8V