Weldmark by Victor WM315400 1.5in steel pressure gauge has a 400psi max pressure, bottom entry port, and rated for industrial work duty. This gauge's primary numbered graduation is set at 20psi increments, and secondary range units in kPa. It connects to a regulator with a 0.125in right hand 27 NPT threaded male connection. Meets or exceeds UL252A standards, and boasts a 2 years standard warrenty.