This hose trolley carrier is used in the Bay Wash Gun Trolley system. It is what enables the bay wash gun hose to be suspended in the air and slide across the wiring that holds the hose up. By using this hose trolley carrier, the wash decreases any likelihood of the hose getting caught in any equipment or being damaged from dragging on the floor. There are 20 of these carriers used in every Bay Wash Gun Trolley system.