... ball, ball conveyor,ball transfer unit 2 use carbon steel, stainless steel, nylon 3 carbon steel is zinc RKM/GCS Conveyor Ball Transfer Unit/ conveyor ball/ ball ... often used in light-duty industries for material handling.2. Ball transfer unit could be made of nylon, stainless ... conveyor chain, conveyor wheel, conveyor bearing, wheel chain, ball transfer unit, return bracket, press bearing, skate wheel, ...