... 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 ... Ball Transfer Unit/ conveyor ball/ ball transfer unit is often used in light-duty industries for material handling.2. Ball transfer unit ... wheel, conveyor bearing, wheel chain, ball transfer unit, return bracket, press bearing, skate wheel ...