Feature:It is a simple valve, no vacuum lets water pass through and when vacuum is applied it shuts the flow off and recirculates it.Perfect match for your original car.The heater control value fits for your exact vehicle.Professional installation is highly recommended (No Instruction Included)This is a non-OEM product, accessory only!Specification:Condition: Brand NewMaterial: Plastic, MetalColor: BlackOE Number: 4H0121671D, 4H0121671B, 4H0 121 671 D, 4H0 121 671 BSize: 11.3x9x4.5cm / 4.45''x3.54''x1.