The 500 series is a large frame structure reel, which is developed and designed to meet the needs of large flow rates and long-distance conveying materials. Usually able to dock hoses with a diameter of more than 1 inch, the length is less than ten meters, up to dozens of meters or more. Hundreds of meters away. The 500 series products have performed well in the material filling process of the production line, the large-flow gas supply operation equipment, the batch waste oil collection and replacement vehicles, the sewer cleaning equipment, the municipal sanitation vehicles, and the fire-fighting equipment of the offshore oil drilling platform. The standard configuration of the reel drive is a hand crank, but also with an optional DC or AC motor, an air motor and a hydraulic motor, and the reel automatically retracts the hose via a sprocket drive.