Replacement Gauge Kit compatible with the following IH Tractors: B250, B275, B414, 276, 354, 434, 444 1 ) Tachometer =M12 X 1 Thread, 80mm fitment 2) Oil Pressure = 2", 1/8" NPT Male Thread 3) Temperature Gauge =2", fitment 72" Capillary , 5/8" NPT Brass Thread 4) Ammeter = 2" fitment (30-0-30)