1. EASY TO USE Our no spill coolant kit provides an effective solution to prevent overflow or air bubbles with a special rotary switch. Turn it gently to close and experience trouble use. 2. SPILL REFILLING When this funnel kit is securely attached to radiators, it ensures a smooth, mess refilling of coolant or oil with no spills or trapped air. The extra long funnel minimizes the risk of spilling or leakage during the coolant flush process. 3. INNOVATIVE FUNNEL DESIGN The extension rod is carefully crafted to reach tight areas, making the funnel kit ideal for use in confined spaces. In addition, the reinforced thread design ensures a spill experience even in harsh conditions. 4. WIDE APPLICABILITY Whether you need to perform multipurpose coolant pressure tests, radiator purges, or engine flushes, this coolant kit has you covered. The coolant filling kit features a universal adapter that fits both domestic and foreign vehicles.