1-500t battery operated transfer trolley for steel factory China Factory 1-500t Industrial Steel Coil Transfer Electric Flat No Rail Trackless Transfer Cart Supply FOB Price: US $3,500-4,000 / Set. Min. Order: 1 Set Kpx 1-500 Tons Heavy Duty Transporter Battery Operated Transfer Trolley Moving on Rails FOB Price: US $3,500-4,000 / set.