This is the HS-5055MG Sub Micro Digital Feather Servo from Hitec. FEATURES: Programmable Overload protection Metal gears Lightweight Ideal for park flying models, indoor planes, small glider, and micro electric helis INCLUDES: One Hitec HS-5055MG Micro Digital Feather Servo with preinstalled small X-shaped servo horn and screw One 28mm straight servo arm One 31mm servo arm One 54mm servo arm One 1.6x3.75mm button head screw Two 1.7x8mm flanged button head screws SPECS: Speed: 0.20sec/60° at 4.8V 0.17sec/60° at 6V Output Torque: 1.3kg-cm (18.05oz-in) at 4.8V 1.6kg-cm (22.20oz-in) at 6V Weight: 9.5g (0.33oz) Size: 22.8 x 11.6 x 24mm (0.89 x 0.45 x 0.94in) cnh 8/27/09 ir/jxs