Tactic TSX55 Ultra Torque MG 2BB Standard Servo FEATURES: Metal gear train with two ball bearings Universal receiver connector compatible with all major brands of radio systems One year limited warr INCLUDES: Tactic TSX55 Ultra Torque Metal Gear Servo 0.82 (20.8mm) diameter Round Horn 1.5 (38mm) 4-Point Horn 1.2 (31.9mm) 6-point horn Four each,