The Ford D6NN19N644B is a genuine OEM air conditioning hose assembly designed for various Ford agricultural and industrial tractors. This essential component ensures proper refrigerant flow within the air conditioning system, maintaining cabin comfort. It is compatible with Ford 2000, 3000, 4000, 5000, 7000, 2600, 3600, 4600, 5600, 6600, 7600 series tractors, as well as utility models 231, 233, 333, 335, 420, 515, 531, 532, 535, 340, 445, 545. Replaces part number D4NN19N644B.