The Copper Pipe Tube Expander is an essential hand tool for anyone working with refrigeration, allowing for easy expansion of copper, aluminum, and thin-walled stainless steel pipes ranging from 4-22mm in diameter. Designed with convenience in mind, this lightweight tool features an ergonomic design for a comfortable grip, making it simple to create perfectly rounded expansions for seamless copper tube docking and welding. With dimensions of approximately 15.5 x 15.4 cm, this pipe expander is a reliable addition to your toolkit for efficient plumbing and HVAC projects.