Kleinn Safety Valve, 1/4" M NPT with a 155 PSI pop-off rating, is a pressure relief valve specified for systems needing that particular release threshold. The 1/4" male NPT thread and 155 PSI set point identify it as a replacement or component for pneumatic systems that require a pop-off at that pressure level.
Kleinn Safety Valve - 1/4In M NPT - 155 PSI Rated Pop-Off Valve