Freewing 30g Coreless Metal Gear Reverse Servo with 100mm (3") Lead - MD31303R-100
This servo is used for various 80mm\/90mm Freewing EDF jets.  It can be used with other aircraft with compatible specifications (see below).
Features:

Lightweight, efficient high torque digital metal gear servo perfect for larger-sized EDF jets

Includes:

Freewing 30g Coreless Metal Gear Reverse Servo with 100mm (3") Lead
4 mounting screws
3 servo horns