Material and construction Brass construction: copper pipe connectors are made of brass, offering good corrosion resistance and durability, and they resist cracking to provide a long service life. Installation and usage Easy to install: no welding required. Simply tighten with a wrench for quick maintenance and replacement. Accurate dimensions: designed for copper tubes with a 3/8 inch (9.52 mm) outside diameter. Accepts copper pipe outer diameters between 9 mm and 10 mm. Scope of application: serves as a connection between two copper pipes (onetotwo). Suitable for copper pipe connections in air conditioning systems, with both doubleend and middle connection configurations. Use scenarios Air conditioner piping: join or extend refrigerant lines without welding, enabling reliable, leakresistant connections in common 3/8 inch tube networks. Refrigeration systems: install or copper tubing runs in compact or accessible areas where welding is impractical. Residential plumbing maintenance: connect or branch 3/8 inch copper tubes during upgrades or repairs in homes or light commercial settings, providing a secure, nonwelded joint. Notes Dimensions are specified for 3/8 inch copper tubes (9.52 mm OD); ensure the tube diameter falls within the 9–10 mm range for a proper fit.