Air Combination Unit(F.R.L. Set), Components: MAFR401+MAL401, Port Diameter Code: 15A(1/2), Appearance Color: White&Gray, Type: High-Pressure Type, Pressure Gauge: External Pressure Gauge(PG-40)+Manifold(A-MAR401), Drain Valve: Semi-Auto Drain Water, Level Switch: With Level Switch(MLF400), Pressure Sensor: Without, Flow Direction: Left¡úRight, Digital Pressure Sensor: Without, Filtration Rating: 40¦Ìm, Branch Port Diameter Code: Check Valve1/4, Shut-off Valve: Without, Port Thread: Rc Thread