The funnel's bleeder valve allows air to escape while filling, preventing airlocks that can cause overheating or poor heater performance. This professional-grade feature ensures your cooling system operates at efficiency. The integrated spill-proof valve seals tightly to your radiator or coolant reservoir, preventing messy spills and air bubbles from entering the system. This ensures a clean, precise coolant fill every time, without wasting fluid or damaging your engine bay. All components are made from high-grade plastics that resist from coolants and withstand temperatures from -40°F to 250°F. The robust construction ensures the kit lasts through years of regular use in any weather. The included rubber mat keeps all parts organized and protected, fitting easily in your toolbox or trunk. Whether you're a DIY or a professional, this kit is ready for roadside repairs or routine maintenance., Weight: 1.3889122506 Pounds, Manufacturer: Prterver