This is the fuel sending unit that is used on 1945-1956 CJ2A, CJ3A and CJ3B models. The fuel sending unit has a brass float and comes with the sending unit gasket. This is used on fuel tanks with the 5 bolt sending unit. This is the not cheap one with the plastic float that will leak in a month! Note on CJ3B models check if it is a 5 bolt sending unit. 1 Required per Jeep.