Rectifier (voltage regulator) commonly used on larger 4-stroke scooter engines (sizes 125cc, 150cc, 250cc). 5 wire colors are black, red, pink, yellow, and green.
This 5-pin 5-wire 1 plug rectifier fits several GY6 150cc scooters, as well as 90cc dirt bikes and ATVs. A very common scooter & ATV part that requires replacement. Note this rectifier has a female pin connector.