4M300 Namur Series Solenoid Valve * 4M310-08/10-AC/DC * 4M320-08/10-AC/DC * 4M330C-08/10-AC/DC * 4M330P-08/10-AC/DC * 4M330E-08/10-AC/DC 08=> PT(Rc)1/4" Port Size 10=> PT(Rc)3/8" Port Size C=> Closed Center P=> Pressure Center E=> Exhaust Center DC=> 24V DC Voltage AC=> 220V AC Voltage