Dr. Drop is an ingeniously simple pressure tester for your entire water cooling loop or for single components. With an included air pump, a test pressure can be applied. A large manometer with a diameter of 63 mm allows for precise pressure readings. A second valve is included to discharge the pressure after testing. The pressure tester has a G1/4 inner thread to be equipped with a hose fitting compatible to your preferred hose diameter. Added bonus for bicyclists: The air pump fits car tire valves (Schrader) as well as French (Sclaverand) tyre valves. A pump holder (hole pattern like bottle holder) is included as well. Technical details: Base part material: Delrin, black Measuring range: 0 - 0.6 bar (approx. 0 - 8.7 PSI) Connection thread: G1/4 Scope of delivery: Pressure tester Air pump Hose fitting and hose not included in delivery!