- Material and precision: Made from pure copper, this measuring instrument delivers highly accurate measurements and consistent results. The robust construction supports long tool life. - Thread and compatibility: Features a W21.8 x 1/14 inch thread, ideal for standard air cylinders. - Wide applicability: Ensures seamless welding accuracy, helping you reach your welding goals with ease. Widely used in heavy machinery environments, it is a reliable tool for technicians to tackle a broad range of welding issues. - Exquisite craftsmanship: High quality fabrication with meticulous attention to detail, providing solid protection and a premium appearance. - Use scenarios: - Use with standard air cylinders in production lines for setup and calibration. - Welding quality control and alignment checks in heavy machinery fabrication or maintenance. - On-site installation and servicing where precise measurement and cylinder compatibility are required.