This is a used gear and shaft set out of  a John Deere 425 garden tractor rear end. These parts will also fit in 445 and 455 tractors. The part number for the shaft is M806112 and the number for the gear is M806113. The splines do show a little wear on them and they have some surface rust on them. The gear teeth don't appear to have much wear on them. (26b)