Weldmark by Victor WM325000 2.5in brass pressure gauge has a 4000psi max pressure, bottom entry port, and is rated for industrial work duty. This gauge's primary numbered graduation is set at 500psi increments, and secondary range units in kPa. It connects to a regulator with a 0.25in right hand 18 NPT threaded male connection. Meets or exceeds UL252A standards, and boasts a 2 years standard warrenty.