This is a A-251 Chain, Gathering, Black Pin PN: 251Main Description As Following : A-251 Chain, Gathering; Black Pin P.N: 251 Dim A (1): CA555 ENDLESSDim B (2): 48 LINKSDim C (3): Black PinDim D (4): Each Flight Extension Has 2 Predrilled Holes For Applications With Paddles.Replaces: 1133997R1, 1306953C91 Crosses To: A-B1SB251 ROTARY , A-FF5065 CROSLAND , A-FF5065J CROSLAND , Replaces: A-AN102009 JOHN DEERE , AN102009-E JOHN DEERE , A-176279C91 IH COMBINE , 176279C91-E IH , 251-E MISCELLANEOUS , 37843 MISCELLANEOUS , A-610831 NEW HOLLAND , A-610831-E NEW HOLLAND , A-86523386 NEW HOLLAND , Crossed From: AM86523386 , , K102009 KOOIMA COMPANY , SH100 SHOUP , SW05136 , , TP-AN102009 , , WN-AN102009 , , WNAN102009 , , 1133997R1 MISCELLANEOUS Found in Section & Models : Headers/Platforms/Feeder House > Corn Head Parts, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Dim A (1): CA555 ENDLESS Dim B (2): 48 LINKS Dim C (3): Black Pin Dim D (4): Each Flight Extension Has 2 Predrilled Holes For Applications With Paddles. Replaces: 1133997R1, 1306953C91