SMC: AW40-F04E-B FRL Manual Drain C/W Gauge G1/2 This combination filter/regulator minimizes space and piping by integrating the two units into one. Features include a relieving regulator. The AW modular air preparation unit can be combined with other similar sized products. Size: 1/8 thread. Gauge port: G1/4. Comes with square embedded type pressure gauge with limit indicator. MPN: AW40-F04E-B FRL Manual Drain C/W Gauge G1/2 Attributes: MFR Part No.: AW40-F04E-A Port Size: G1/2in Product Type: Air Regulator