Weldmark by Victor WM320050 2in steel flow gauge has a 50psi max pressure, bottom entry port, and rated for industrial work duty. This gauge's primary numbered graduation is set at 1psi increments, and secondary range units in kPa. It connects to a flowgauge regulator with a 0.25in right hand 18 NPT threaded male connection. Meets or exceeds UL252A standards, and boasts a 2 years standard warrenty.