Micro Matic Premium Primary CO2 Regulator (60 & 3000 PSI) 
Primary CO2 regulator with 2 gauges from Micro Matic.
The gauges read up to 60 and 3000 PSI, and the safety pressure relief blows off at 55 to 65 PSI.
It has a chrome plated brass body.
The outlet is a shut-off valve with a 3/8" OD barb, and the inlet is CGA320.