Coolant Funnel: The Innovative bleeding kit controls the coolant entering system and enables unattended Filling. Eliminates air pockets which may cause instability in the cooling system and heater. Fill Securely Without Leaks: Highly sealed interface & clear funnel design, allows a quick visual check of the coolant. Take up the mess and save your time. Robust Material & Fine Workmanship: Made of Plastic + Metal material. Test to withstand 200 degrees high temperature & accidental falls (Unless encounter a severe external force). Suitable for Most Vehicles: Multiple adapters, 2x45degree elbows & a 5inch extender, Fit Radiators or Surge Tanks on Most Domestic and Import Cars and Light Trucks. Economic Design: The Fluid Stopper help you economically recycle coolant in the funnel after . Bright color and sealed lid help you to storage efficiently. Instructions: 1. Install the correct size adapter and Tight to make sure it doesn't leak. Place the gasket in a downward position. 2. YOUR CAR SHOULD BE OFF, DO NOT START THE CAR YET! Fill the coolant funnel about 1/3 up while COLD, so when system burps fluid falls into the system rather than more air. 3. Go to your car and set the climate controll settings (or heat setting) to the hot, but make sure that the fan/heater is "OFF". 4. Now START you car, let the car idle for a while until it's hot enough to open the thermostat and turn on the fans. After waiting, and once the thermostat opens up to cool your engine you'll see the coolant level drop, and a few to a large amount of air comming up, this is the air escaping your cooling system. 5. After standard hour of running, if you still see air bubble comming out, check your overflow tank and make sure it has coolant in it. 6. When run the engine, fluid l should be at low position. Keep RPM on idle position. (Shut down the engine if notice the fluid level rise excessivel