This is a A-E91161 Arm, Drive, Flex PN: E91161Main Description As Following : A-E91161 Arm, Drive; Flex P.N: E91161 For Flex Heads Found in Section & Models : Headers/Platforms/Feeder House > Grain Head Parts, John Deere HEAD, CUTTING PLATFORM: 900 SERIES (Flex; 2000-2002 - SN 685401>) Associated Items : New Also This is An Aftermarket Product And : For Flex Heads