SMC: AW40-F04D FRL Auto Drain 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-F04D FRL Auto Drain G1/2 Attributes: Drain Type: Auto Operating Temperature Range: -5 to 60°C Port Size: 1/2in Pressure Gauge Port Size: 1/2in Pressure Range: 1bar Product Type: Filter Regulator Weight Each: 1.95877g