DESCRIPTION Ag Systems 8500 Tool Bar (DR12828 Unit TB409), 25 knife pull type tool bar, dual Raven coolers, NO HARNESS or monitor, walking tandem main frame axles, hydraulic wings and gauge wheels, 22.5 tires. Serial Number: Notes: There are some frame cracks on this bar, some are shown in pictures. There are some that have welded as well. Call seller for more details.