This is a Cub Cadet Farmall IH-71908-c1 rotor. It fits:

184 Tractor
Cub 154 Lo-Boy Tractor
Cub 185 Lo-Boy Tractor
Farmall Cub Tractor (S/N 185,001 to 210,000)
Farmall Cub Tractor (S/N 210,001 to 222,500)
Farmall Cub Tractor (S/N 222,501 to 224,704)
Farmall Cub Tractor (S/N 501 to 185,000)
International Cub Lo-Boy Tractor (S/N 10,001 to 17,200)
International Cub Lo-Boy Tractor (S/N 17,201 & Above)
International Cub Lo-Boy Tractor (S/N 501 to 10,000)
International Cub Tractor (S/N 224,705 & Above)