Effortless Pipe Extension: Extend copper pipes without welding; simply align flared pipe ends to a thread; tighten flare nuts by hand or with a wrench for a secure connection Wide Compatibility: Ideal for air conditioning systems, HVAC projects, refrigeration equipment, water pipe systems, and industrial pipelines; suitable for residential, commercial, and industrial applications Solid Construction: Made from solid brass for exceptional durability; provides corrosion resistance, strength, and toughness to ensure a long-lasting connection Dual-Size Set: Includes two connectors for 1/4-inch and 1/2-inch outer diameter copper pipes; versatile and convenient for various pipe connection needs Installation Note: Before connecting, slide the flare nuts onto the copper pipes, then flare the ends of the pipes Our copper pipe expansion connectors are designed for quick and reliable pipe extensions without the need for welding. Made from solid brass, these connectors provide corrosion resistance and long-lasting performance. These connectors offer easy installation by aligning the flared ends of the copper pipes to the threaded union and tightening the flare nuts either by hand or with a wrench. The set with different sizes offers flexible options for various piping projects. Suitable for use in HVAC systems, refrigeration equipment, water pipe systems, and various industrial applications, they ensure a secure and stable connection that meets both residential and commercial needs.