This is a Heavy Duty 36" Servo Extension with Hitec-S, JR, Airtronics-Z Connectors.This extension goes between the receiver and the servo to make the wire longer. On one end of the wire is a male connector and on the other end of the wire is a female connector.FEATURES: Gold-plated teminals improve conductivity and prevent oxidation for longer lifespan. Heavier, 20-gauge wire handles higher current loads.INCLUDES: One 36" Long Servo Extension w/Hitec-S, JR, Airtronics-Z Style ConnectorsSPECS: Wire Gauge: 20 Wire Color Codes- JR- Hitec- Airtronics Z- Brown: ground Black: ground Black: ground Red: positive Red: positive Red: positive Orange: signal Yellow: signal Blue: signalHitecPart HRC54606S