GENTEC R21 SERIES REGULATOR.
click link below for video.
https://youtu.be/6oxo9En2XUI?si=W5E1mPrI_xDlNHWW
STOCK: 
 
• Single-Stage Configuration
• Metal-to-Metal Seal
• Body Port Size: 1/4” NPT(F)
• 2” Pressure Gauge
• Inlet: 3000 PSI
• Outlet: 0 - 150 PSI
• 1/4" NPT(F) Inlet & Outlet Connection c/w Panel Mount
• 205CP Needle Valve & Relief Valve