BMS-705 Low Profile High Torque Servo 6.0kg / .18sec / 28g It was designed for F3A high performance of low profile, better precision movement and low electric impedance, the low profile servo is a great choice to move your retract gear in the realistic manner that you want it to. This servo comes with JR/Hitec S Connector also known as a "Universal Connector". Even thought this servo comes with JR/Hitec S Connectors, this servo is electrically compatible with Futaba receivers. 1. Carbon nylon gear 2. curve gear with smooth. 3. Double M9.6 ball bearing (si-oil) 4. 3 pole strong torque of motor with low signal affect and success get CE certification. 5. Rubber fitting case for waterproof 6. Same with Futaba 25 tooth spline 7. Heavy duty servo case Weight: 28g / 0.99oz Dimensions: 42 x 21.5 x 22 mm / 1.65 x 0.85 x 0.87 inch Torque At 4.8V: 6.0kg/cm , 83 oz/in Speed At 4.8V: 0.18 sec / 60 at no load