This is a Heavy Duty Futaba J-Series 200mm Servo Extension. This extension goes between the receiver and the servo to make the wire longer. On one end of the wire is a male connector, the other end is a female connector. FEATURES: Connectors slide snugly together to guard against vibrating loose. Gold-plated terminals improve conductivity and prevent oxidation for longer lifespan. Heavier, 20-gauge wire handles higher current loads with ease. INCLUDES: One Heavy Duty Futaba J-Series 200mm Servo Extension SPECS: Wire Gauge: 20 Length: 7-7/8" (200mm) (between terminal ends) Wire Color Codes- Black: negative Red: positive White: signal (polarity tab is on the signal side) JXS 5/30/01 ir/jl