Dual gauge design: With two gauges, one gauge indicates the carbonation and output pressure. The other gauge shows the amount of CO2 remaining High quality and durability: Forged brass body, machined with precision and chrome plated for added durability. The polycarbonate flow tube and housing are impact resistant and therefore durable. maximum Safe and easy to use: Designed for MIG and TIG applications to provide a precise gas flow regulator. Safety valve that can be pulled out to relieve pressure when not connected. [2-in-1 design] Regulator and flow meter in one, easy to adjust knob. Use the pressure to adjust the pressure from minimum to maximum. maximum [Excellent workmanship] Compact, perfect and well sealed. The scale is clearly visible and will never fade. Each unit is a safe and reliable product