This is a Brand New High Quality Water Temperature which replaces the original gauge it comes with the manufacturers warranty and is found on the following Tractors models : Tractor Make/Model David Brown: 25 D, 30 D, 900, 950 Massey Ferguson: 1200, 1250, 135, 148, 165, 168, 175, 178, 185, 188, 35, 35 X, 410, 415, 50, 510, 515, 520, 525, 620, 625, 65, TE20 F Manufacturer Part No David Brown: K11638 Massey Ferguson: 1078125M91, 180727M91, 180727M92, 180727M93, 881369M91, 881396M1, 881396M91, 899455M91 Replaces 180727M91, 1078125M91, 1850512M94, 881396M91, 899455M91, 10A2229, TO17273, 15A9741, 10A21284, 100679 A Dim A (1) 60" Capillary Tube Dim B (2) w/ 5/8" UNF Connector Dim C (3) 2" Body Dia.