Sprocket, 28T #50 or 14T #2050 1.25"ID x 5.90"OD x 1.50" wide hub with 2 tapped holes 1/2""-13 thread. New OEM AGCO Sprocket part number 71137714. EIII (EFF S/N 25001) / K SERIES (PRIOR S/N 24200) COMBINE; F COMBINE (PRIOR S/N 12201); F COMBINE (S/N 12201-32201); F3 COMBINE (EFF S/N 51001); K2 COMBINE (EFF S/N 24201-27200); L2 / L3 (EFF S/N 13001-28000) COMBINE; L3 (EFF S/N 28001) / M3 (EFF S/N 25901) COMBINE; M2 / M3 SERIES COMBINE (EFF S/N 15401-25900); MH2 HILLSIDE COMBINE.