The Hitec HS-55 continues the Hitec tradition of affordable performance. Featuring precision components that have been engineered to provide long lasting trouble free service. The HS-55 is the perfect choice for any micro application from indoor R/C and hand launch gliders, to ultra small electric Park and Yard flyers, Speed 400 and 1/2A powered aircraft Includes: (1) Hitec HS-55 Micro Servo with mounted four-arms horn (2) Plastic Horns (small 2-arm, large 2-arm) (2) Servo Mounting Screws (1) Horn Mounting Screw SPECIFICATIONS: Dim 0.89 x 0.45 x 0.94 inches (23 x 12 x 24 mm) Weight: 0.28 oz (8 g) Speed: 0.17 sec/60 degrees @ 4.8V Speed: 0.14 sec/60 degrees @ 6.0V Torque: 15 oz-in (1.1 kg-cm) @ 4.8V Torque: 17 oz-in (1.3 kg-cm) @ 6.0V Wire Length: ~ 10 inches (25 cm) Universal Connector: will fit Futaba J, Hitec, JR, Airtronics-Z