T-H-B CO EDGE INDUSTRIAL 3/8" in-line compressed air pressure regulator, 7 to 150 psi adjustable, bracket, gauge
Amazon.com: 3 Way Air Compressor 1/4" Pressure Regulator Gauge 140PSI Control Valve : Tools & Home Improvement
Norgren - Compressed Air Regulator: 3/4" NPT, 400 Max psi, Air Pilot Operated - 01724756 - MSC Industrial Supply
YXQ AFR-2000 Pneumatic Filter Regulator Air Compressor Source Treatment Unit with Pressure Gauge: Amazon.com: Industrial & Scientific
HEAVY DUTY IN-LINE COMPRESSED AIR PRESSURE REGULATOR FOR AIR COMPRESSOR, 7 TO 215 PSI ADJUSTABLE, HIGH FLOW RATE, WALL BRACKET AND GAUGE INCLUDED (3/4" NPT, 140 CFM) - - Amazon.com