The Kuhn N3501830 Upper Tube Assembly is a genuine OEM replacement part designed for various Kuhn FC series mowers. This essential component ensures proper function and structural integrity within the machine's assembly. It is compatible with models including FC 243, FC 283, FC 313, FC 353, FC 403, FC 443, FC 813, FC 883, FC 933, FC 1003, FC 243 R, FC 283 R, FC 313 R, FC 353 R, FC 403 R, FC 443 R, FC 813 R, FC 883 R, FC 933 R, and FC 1003 R.