This is a A-71871 Idler Sprocket PN: 71871Main Description As Following : A-71871 Idler Sprocket P.N: 71871 For No. 60 Chain (15 Tooth) Stocked As: A-IS601558 Found in Section & Models : Miscellaneous > Miscellaneous, Farmhand (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : For No. 60 Chain (15 Tooth)