Genuine new in box CNH part number 84461190 Drive sprocket, to fit the following headers: 

CASE 2030, 2040 and 2050

NH EXTRA CAPACITY GRAIN HEADER 01/04-12/16, HIGH CAPACITY GRAIN HEADER, VARIFEED GRAIN HEADER 17-20FT 05-16,.

Please see the photos and check the parts catalogue for correct fitment before ordering.