Heavy Duty in-LINE Compressed AIR Pressure Regulator for AIR Compressor, 7 to 215 PSI Adjustable, HIGH Flow Rate, Wall Bracket and Gauge Included (1/2" NPT, 130 CFM) - Amazon.com
Esco 10601 Inline Preset Air Reducer, 110 PSI
VIAIR Inline Pressure Regulator 90150 - The Home Depot
HVLP Spray Air Regulator Pressure Gauge 1/4" Mini Inline Air Filter Separator Adjustable Air Pressure Regulator Gauge - AliExpress
Interstate Pneumatics WR1110 1/4" NPT In-Line 90 PSI Fixed Preset Pressure Regulator – Outlet Pressure with Max Inlet 230 PSI