This is a A-307987A1 Concave, Middle/Rear Extension (Corn & Soybean) PN: 307987A1Main Description As Following : A-307987A1 Concave, Middle/Rear Extension (Corn & Soybean) P.N: 307987A1 Quantity: 2 UsedReplaces: 1318556C1Type: Corn & Soybean Replaces: CIHCE16800MR *** NO CLASS *** , 1318556C1 IH COMBINE , Crossed From: AV100305 VAPORMATIC , V18027MR , Found in Section & Models : Threshing Area > Concaves, Case-IH COMBINE: 1680 (Used With Concave A-193783C5), Case-IH COMBINE: 1682 (Used With Concave A-193783C5), Case-IH COMBINE: 1688 (Used With Concave A-193783C5), Case-IH COMBINE: 2188 (Used With Concave A-193783C5), Case-IH COMBINE: 2388 (Used With Concave A-193783C5) Associated Items : New Also This is An Aftermarket Product And : Quantity: 2 Used Replaces: 1318556C1 Type: Corn & Soybean