50/60HZ 50:1 HPCB 12V 50:1 HPCB 12V DUAL-SHAFT 50:1 HPCB 6V 50:1 HPCB 6V DUAL-SHAFT 50:1 METAL GEARMOTOR 37DX54L MM 12V HELI 50:1 METAL GEARMOTOR 37DX70L 24V 64 CPR 50:1 METAL GEARMOTOR 37DX70L 64 CPR 50:1 MICRO METAL GEARMOTOR LP 6V EXTENDE 50:1 MICRO METAL GEARMOTOR MP