Tractor Gear box housing: casting material: HT250 hardness :170-241HB professional production line competitive ... :series 700 gearbox, series 800 gearboxBoth gearbox and rear axle housing of series 700 and series 800 are Foton series.Other ... , series 804 front bracket2.rear axle housing: Series 700 rear axle housing, series 800 rear axle housing (single output, double output)3. axle ...