This premium brass ACME R134a adapter provides a reliable connection between 1/4-inch male and 1/2-inch female fittings, perfect for HVAC service . The adapter features a built-in valve core for controlled refrigerant flow and precise system servicing. Crafted from durable brass with a knurled grip pattern for secure handling, this fitting ensures a leak-free seal and long-lasting performance. The compact design allows for easy access in tight spaces while maintaining optimal flow characteristics. This essential service tool is compatible with standard R134a systems and equipment, making it a versatile addition to any HVAC toolkit. The corrosion-resistant brass construction ensures reliability in various working conditions and temperatures.