Straw chopper knife only. Does not include bushings or hardware. Abrasion resistant, heat treated.To fit John Deere® 7720, 8820, 9400, 9500, 9510, 9610 series corn heads.For John Deere® 9400 and 9500 series 30 are required.For John Deere® 9510, 9600 and 9610 series 36 are required.








