Clutch Booster 1. Material: steel 2. 70, 90, 102, 105mm 3. For HINO, BUS, TRUCK Clutch Boosterclutch booster 70AIR: M14*1.5HYD: M12*1.5Stroke: 30MMOil Cylinder Diameter: 22.2MMMax Operating Pressure: 1MpaOperating Temperature Range: -40oC-80oCOperating Hydraulic Pressure: 6MpaOriginal No.: 642-03080