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, 3/8inch 9.52mm, 1/2 inch 12.7mm, 5/8 inch 16mm, or 3/4inch 19mm, different size for yo to choose Air Conditioner Maintenance: Air conditioner stop valve is an essential service access valve for air conditioner maintenance and repair. For installation, Professional Service Technician is recommended Wide Application: Air conditioner valve connects the outdoor and indoor units, high and low pressure stop, and as a shut-off valve, making it an essential component for various HVAC systems Specification: Material: Copper Size Chart: Connect Diameter: 6.35mm/0.25inch or 9.52mm/0.37inch or 12.7mm/0.50inch or 16mm/0.63inch or 19mm/0.75inch Package Includes: 1 Piece Air Conditioner Stop Valve Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.