SMC AR30-N02-Z-B-X406 Regulator MSRP: Now: $25.30 Was: AR20(*)-B to AR60(*)-B, Regulator & Regulator w/Backflow FunctionAir Regulator Series AR-B have been updated to the new urban white base color for a clean modern look. The AR-B series has a... AR30-N02-Z-B-X406