Premium Brass Construction: Crafted from brass, this 90 degree elbow 3 way angle stop valve is sturdy and reliable Efficient Flow Control: Air conditioner outdoor unit stop valve is suitable for managing flow in refrigeration system, ensuring optimal performance and energy efficiency Optional Dimensions: Suitable for copper tube diameter 1/4 inch 6.35mm, 3/8 inch 9.52mm, 1/2 inch 12.7mm, 5/8 inch 16mm, or 3/4 inch 19mm, different sizes available Air Conditioner Maintenance: Air conditioner stop valve is an essential service access valve for air conditioner maintenance and repair. Professional installation is recommended Wide Application: Air conditioner valve connects the outdoor and indoor units, handles high and low pressure stop, and functions as a shut-off valve, making it an essential component for various HVAC systems Specification: Material: Copper Size Chart: Connect Diameter: 6.35mm / 0.25 inch 9.52mm / 0.37 inch 12.7mm / 0.50 inch 16mm / 0.63 inch 19mm / 0.75 inch Package Includes: 1 Piece Air Conditioner Stop Valve Note: Please allow slight measurement errors of 1-2 cm due to manual measurement