This is a high quality and accurate regulator and that's why we include it in our air management systems. This US built unit features a reinforced diaphragm for repeated accuracy, micro finished brass seat to ensure no reduced pressure creep. Three- position non rising adjustment knob; push to lock, pull to adjust, detach to make tamper resistant. High SCFM flow due to efficient aspiration. Max 125 psi, Max flow 100 cfm 1/2" NPT. MADE IN USA.