Tactic TSX20 High Speed 2BB Mini Servo FEATURES: Dual ball bearing equipped Universal receiver connector compatible with all major brands of radio systems One year limited warranty through INCLUDES: Tactic TSX20 High Speed Mini Servo 0.83 (21mm) diameter Round Horn 1.5 (38mm) 4-Point Horn 1.2 (31.9mm) 6-point horn 1.5 (38mm) Double A