Material and durability Copper construction delivers durability and longlasting performance for refrigeration systems. Wide application Suitable for refrigerators, air conditioners, refrigeration compressors, and refrigeration airconditioning units. Also applicable to other uses such as automotive and wheelrelated applications. Ease of use Designed for convenience, easy to install and operate, and supports hassle maintenance of refrigeration and airconditioning systems. Safety and reliability Safe working pressure of 4 MPa, providing a secure and reliable solution for managing and conducting leak pressure tests on pipe fittings. Use scenarios Refrigeration and HVAC service: ideal for leak testing and pressure testing during installation or maintenance of residential or commercial refrigerators and air conditioners. Pipe fittings and system testing: suitable for leak pressure tests on pipe joints in refrigeration systems and HVAC units. Automotive and wheel applications: applicable to automotive piping and related wheelrelated systems requiring pressure testing.