... ball conveyor in tower shape or disc shape Model Type Size Mtl PC254 Round orTower shapeDia50 carbon steel,stainless ... steel,stainless steel,nylon1. Conveyor Ball Transfer Unit/ conveyor ball/ ball transfer unit is often used in light-duty industries ... conveyor wheel, conveyor bearing, wheel chain, ball transfer unit, return bracket, press bearing, skate wheel, plastic pulley, adjustable feet and ...