Scope of application:mm Ø 34 - 52 mm.Inlet Hose 1 meter.Outlet Hose 0.5 meter.MPA:-0.1 to 0.mmHg:-760 to 0.QUICK EXCHANGE :lt's negative working pressure is up to 80kpa, which greatly improves efficiency.Notice:When pulling a vacuum, close the valve first and then open it slowly.When the expected pressure value is reached, close the valve quickly.For cars used less than 5 years, the recommended pressure is between-80 ~-85kpa; for cars used for more than 5 years, the recommendedpressure is between -70 ~-75kpa.Three different specifications of adapterheads, can be selected accordingto the size of the coolant spoutPacking List :A: Main UnitB: Male Coupler to shop airC: AdaptersD: Inlet HoseE: Outlet Hose