Air Combination Unit(F.R.L. Set), Components: MAFR401+MAL401, Port Diameter Code: 8A(1/4), Appearance Color: Silver&Black, Type: High-Pressure Type, Pressure Gauge: Pressure Gauge Manifold(A-MAR401), Drain Valve: Semi-Auto Drain Water, Level Switch: With Level Switch(MLF400), Pressure Sensor: Pressure Sensor(MPS Series), Flow Direction: Right¡úLeft, Digital Pressure Sensor: Without, Filtration Rating: 40¦Ìm, Branch Port Diameter Code: Check Valve3/8, Shut-off Valve: Without, Port Thread: NPT Thread