This is a A-IS601512 60 Idler Sprocket 15T 1/2 PN: IS601512Main Description As Following : A-IS601512 60 Idler Sprocket 15T 1/2 P.N: IS601512 Bore: 1/2" BearingChain Size: 60Teeth: 15 Replaces: A-F53736 CASE , IS6015-12 SPROCKET/HUB/PULLEY/IDLER , A-PS6523 RIVERSIDE TRACTOR , A-165271 NEW HOLLAND , A-1813001 VERMEER , A-571441R1 IH , 571441R91 IH COMBINE , Crossed From: C1671 SHOUP , H7812 , , WSIS601508 , , A-165271 , , 833494M1 , , 971-25601508 , , 97125601508 , Found in Section & Models : Chains/ Sprockets/ Pulleys/ Hubs > Idler Sprockets, (Miscellaneous) (UNDEFINED): SEVERAL, Headers/Platforms/Feeder House > Grain Head Parts, Case-IH COMBINE: 1482, Case-IH COMBINE: 303, Case-IH COMBINE: 403, Case-IH COMBINE: 503, Case-IH COMBINE: 715, Case-IH COMBINE: 914 (S/N 8001>), Case-IH HEAD, CUTTING PLATFORM: 810, Case-IH HEAD, CUTTING PLATFORM: 820 Associated Items : New Also A-IH-S-1482COMB, A-IH-P-303, A-IH-P-ENG56CYL, A-IH-P-ENG6CYLG, A-IH-P-403, A-IH-P-403HSCMB, A-IH-S-ENG460ETC, A-IH-S-ENG6CYLG, A-IH-O-503COMB, A-IH-P-503COMB, A-IH-O-715ERLY And : Bore: 1/2" Bearing Chain Size: 60 Teeth: 15