SMC ARG20-N02G1H-Z-X2108 Regulator, Gauge-Handle MSRP: Now: $39.85 Was: regulator, modular f.r.l. w/gauge regulator, gauge-handleNote that the ARG-B has been released as a replacement for the ARG. While the ARG is still supported with inventory and no obsolescence... ARG20-N02G1H-Z-X2108