Premium Brass Construction: Crafted from brass, this 90-degree elbow 3-way angle stop valve is sturdy and reliable Efficient Flow Control: This air conditioner outdoor unit stop valve is suitable for managing flow in refrigeration systems, ensuring optimal performance and energy efficiency Optional Dimensions: Compatible with copper tube diameters of 1/4 inch (6.35mm), 3/8 inch (9.52mm), 1/2 inch (12.7mm), 5/8 inch (16mm), and 3/4 inch (19mm) for versatile sizing options Air Conditioner Maintenance: This air conditioner stop valve serves as an essential service access valve for air conditioner maintenance and repair. Professional installation by a qualified service technician is recommended Wide Application: Connects outdoor and indoor units, functions for high and low pressure stops, and acts as a shut-off valve, making it a key component for various HVAC systems Specification: Material: Brass Size Chart: Connection Diameter: 6.35mm (0.25 inch), 9.52mm (0.37 inch), 12.7mm (0.50 inch), 16mm (0.63 inch), or 19mm (0.75 inch) Package Includes: 1 Piece Air Conditioner Stop Valve Note: Please allow slight measurement deviations of 1–2 cm (0.39–0.79 inch) due to manual measurement