Expandable conveyor also called flexible conveyor consisting of grooved roller conveyor,timing belt conveyor,poly v belt conveyor,driven by motorized drum or motor.It is also flexible conveyor system,unlike gravity flexible conveyor or skate wheel flexible conveyor or portable roller conveyor. Driven by motorized drum or motor is easier running flex.There is speed controller and sensor installed in the end.Each 1.5m one 90w or 120w motor,material can be carbon steel galvanized or chromating,load capacity 400-450kg each meter.Widely used in warehouse for saving labor and time.The length ,width and height is customized.