Replace Part Number: 17111712788, 111537793373, 5184979AA Comes with rubber O-rings High-Quality Materials: The coolant bleeder screw is made of high quality brass it won't break or deform easily It is resistant to high pressure and high temperature, suitable for various working environments It is not easily corroded or rusted and can be used for a long time Application:The automotive coolant bleed screw is used to control the pressure and temperature inside the radiator coolant tank It prevents overpressure in the tank and overheating of the car engine, ensures the normal operation of your car and improves safety on the road Easy to install and use perfect fit Package includes: 2 X Coolant Expansion Tank Bleeder Screw