In-Line Air Flow Regulator TAODAN 2PCS 1/4" NPT Male to Female Quickun Pneumatic Brass In-Line Air Flow Regulator Valves, Air Pressure Compressor Tool - Amazon.com
Kobalt 3/8-in Air Regulator in the Air Compressor Accessories department at Lowes.com
Quickun Pneumatic Brass In-Line Air Flow Regulator Valve, 1/4" NPT Male & Female, Air Pressure Compressor Tool - Amazon.com
Cylindric Air Regulator for paint spray gun
1pc 1/4" Air Pressure Regulator Spray Tool & In-Line Water Trap Filter with Gauge 0-140PSI/10Bar - AliExpress
Hromee 1/4 Inch NPT Regulator for Air Compressor, Air Pressure Regulator with 0-140 PSI Gauge for Inline Spray Gun - Amazon.com
Inline Pressure Regulator with 1/4 in. Press-in Tube Fittings - AndyMark, Inc