This is a A-B1A31043P COMBO - 18" STIHL PN: B1A31043PMain Description As Following : A-B1A31043P COMBO - 18" STIHL PN: B1A31043P Found in Section & Models : Tractor Parts Associated Items : New Also This is An Aftermarket Product And : High Quality Afternaket Shipped from Both US and Canada