Check the listing for details. PES GH-37D 3.7gram Plastic Gear Sub-Micro Digital Coreless Servo. Condition: New. Listed at 4.49 USD. PES GH-37D 3.7gram Plastic Gear Sub-Micro Digital Coreless Servo Futaba/JR Plug The PES GH-37D digital servo is tiny, lightweight, and ideal for small RC planes. This is a basic no thrills plastic geared coreless digital servo. These are advertised as a 3.7g sized servo, but most of them I have weighed are around 4.9g with the wire and plug, but no control horn.These come with a 6" (150mm) lead with a standard Futaba/JR Plug Specification:Servo Type: digital servoMotor Type: corelessSize: 20.0 x 8.75 x 22.0 mmWeight: 3.7g (actual 4.9g)Voltage: 3.4v-4.8v Speed: 0.13sec/60°(at 4.8V) 0.10sec/60°(at 6V)Torque: 0.5kg/cm (at 3.6V) 0.7kg/cm (at 4.8V)Running Current(at no load): ≤ 10 m A ≤40 m AStall Torque(at locked): 0.42±0.1 kg-cm 0.6±0.1 kg-cmStall Current(at locked): ≤60 m A ≤200 m AWire lead length: 150mm 6"Plug: standard JR Ships worlwide USPS within 24 hours except on sunday. model airplane slow flyer foamie brushless motor depron remote control RC kit arf electric servo micro-servo ultra mini