Futaba S3270SVI Micro S.Bus2 Servo with Metal Case FEATURES: Designed to be used only with small electric airplanes, gliders and EP helicopters Programmable and compatible with S.Bus and S.Bus2 system INCLUDES: HV S3270SVi HS S.Bus2 Servo with I Connector and Instructions 0.71 (18mm) Four Point Horn 1.7 (42.5mm) Four Point Horn Four 1.5x11mm Moun