two shutoffs draft regulator , release at 55 psi  

Specifications:

Type Primary Regulator - CO2,  2 shut offs 

Installation CO2 tank mount (CGA-320 threads), or G3/4

Performance 1 Pressure / 2 Kegs

Output Pressure Gauge 0-60 PSI, for accurate keg pressure

Tank Pressure Gauge 0-3000 PSI, for remaining tank pressure

Capacity SCFM 3.5 Max

Outlet Barbs 3/8" O.D. (To fit 5/16" I.D. Gas Hose) Or to your order

Integral PRV For safety: pressure relief valve releases at  50-55PSI