Great Wall Chain. is your quality supplier of components for overhead conveyor systems, including enclosed track and food handling conveyors. We make conveyor trolleys, including power, free and hand-pushed trolleys, conveyor components such as chain, drive chain, drive dogs, chain attachments, chain lubricators, enclosed track chain, I-beam, rollers, roll bearings, and special components for high heat, heavy loads, contaminated and corrosive environments. Additionally, Great Wall Chain has specialty overhead conveyor components designed for food, paint, automotive, appliance and furniture systems.< br>Great Wall Chain has the know-how to supply the right conveyor component for each application. We can recommend and specify which correct chain, trolley construction and seal design to use that will best suit your particular applications and ensure a smooth running conveyor in your facility. Serving Manufacturing, Warehousing, Distributing, Coating & Plating, Food Ha ndling Industries. Standard, Nonstandard, and Proprietary Products.