1. OE:7799184, NW16 Coolant Hose Plug,Radiator Water Tank Cap,Heater Repair Kit,Leak-Proof Seal Fit for Car Truck SUV(Compatible with BMW X3,X5,3 Series,5 Series,X1,X6,1 Series,4 Series,6 Series,7 Series),16mm,5/8 inch Plug. 2. Made with heat-resistant reinforced rubber (withstands -50°F to 320°F) and corrosion-proof aluminum alloy, ensuring year-round protection against cracks, rust, and coolant leaks. 3. O-ring and pressure-activated valve maintain optimal radiator pressure, prevent overheating, and stop coolant loss even under extreme driving conditions. 4. No tools needed! Simply snap the radiator cap into place. 5. Replace worn parts before they cause engine damage! NW16 Coolant Hose Plug,Radiator Water Tank Cap,Heater Repair Kit,Leak-Proof Seal for Car Truck SUV(Compatible with Mercedes-Benz BMW Audi Volkswagen Volvo Buick Ford Toyota Honda),22mm,7/8 inch. 1.Protect Your Engine, Extend Its Life. Whether you’re driving in scorching heat or freezing winters, this duo keeps your cooling system sealed, pressurized, and efficient.  2.Why Choose Our Kit? - High Quality Materials: cap with rubberized grip + reinforced silicone hose plug. - Emergency-Ready: Compact design fits in your trunk toolkit—be prepared for roadside fixes. 3.What is it? - Universal Radiator Water Tank Cap - High-Pressure Coolant Hose Plug