Uses: is used for tracking antennas as it rotates 360 degrees. The first servo application is like sailing in boats. Model: GWS S125 1T 2BB Specifications:- Ball Bearing- Voltage: 4,8~6.0 V- Torque: 6,6 kg.cm (4,8 V), 7,6 kg.cm (6 V)- Speed: 0.26 seg/60º (4,8 V)- 360º- Weight: 50 gramos- Dimension: 40,5x20x42 mmSTD = Teflon Bushing+Build in plastic bushing with Top Case.2BB= 2 Ball Bearings MG= Metal Gear with Ball Bearings