- Prevents Leakage: The professional design features a precise spring locking mechanism and a textured grip handle, ensuring excellent protection against refrigerant leaks and enhanced safety during use. - High and Low AC Adapters: This set includes a pair of R134a adapter connections, complemented by an additional conversion adapter that converts a 1/4-inch internal thread to a 1/2-inch external thread. - Wide Compatibility: The R134a adapters are compatible with most automotive air conditioning diagnosis AC manifold gauge hoses. The adjustable couplings provide universal compatibility across all vehicle models. - Enhanced Efficiency: Our adapters are ideal for quick-connect applications, where the service port features a 1/4-inch external thread. Work efficiently while ensuring quality results. - Practical Use Scenarios: 1. Use these adapters for safe and efficient refrigerant charging or recovery during vehicle maintenance. 2. Ideal for professional mechanics conducting AC system diagnostics and repairs, ensuring a reliable connection. 3. Perfect for DIY enthusiasts working on car air conditioning systems, enabling hassle-free connectivity and optimum performance. This product is designed to meet the demands of both professionals and hobbyists, ensuring robust performance and ease of use for all air conditioning applications.