Dux Mini Air Regulator (0-300 PSI) complete with Gauge (0-60 PSI). 1/4 Inch NPT Thread For Air Compressor/Air Tools. Viton Extreme Chemical Resistant O-Rings suitable for use with various materials - Amazon.com
CONTROL AIR TYPE 700 0-60 psi PRESSURE REGULATOR | eBay
Precision Pressure Regulator
ToolReg® - 60 PSI, 1/4" NPT, F/M, Pressure Control for Pneumatic Tools | EPS Group