This is a A-418646A1 Concave, Middle/Rear, Large Wire, w/ Heat Treat PN: 418646A1Main Description As Following : A-418646A1 Concave, Middle/Rear; Large Wire, w/ Heat Treat P.N: 418646A1 Quantity: 2 Used Crossed From: HC418646A1 , Found in Section & Models : Threshing Area > Concaves, Case-IH COMBINE: 2377, Case-IH COMBINE: 2388, Case-IH COMBINE: 2577, Case-IH COMBINE: 2588, Case-IH COMBINE: 5088, Case-IH COMBINE: 5130, Case-IH COMBINE: 5140 (SN