This is a very nice heater core. This is a copper brass construction heater core. These copper brass versions are very hard to find. The inlet is 5/8" and the outlet is 3/4". 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, and 1970 LeSabre, Invicta, Wildcat, and Electra 225 models.
