Solid pure copper construction delivers durable and reliable performance throughout the welding process. Efficient precision: Features a W21.8 x 1/14 inch thread compatible with standard air cylinders. Enables fine adjustment of pressure and air stream to optimize welding results. Wide range of applications: High precision meter designed to tackle a variety of welding problems. Widely used in heavy machinery to achieve accurate and repeatable welds. Exquisite workmanship: Meticulous manufacturing and finishing provide all-round protection and a premium appearance. Practical use scenarios: - Welding heavy machinery components where stable pressure and controlled air flow improve joint quality. - Maintenance and repair tasks on equipment using standard air cylinders requiring precise pressure control. - Field welding in industrial settings where portability and reliable performance are needed.