Size/Valve Type: 4 (Size: 10A, 15A; Valve Type: N.C.), Body/Port/Orifice: H (Body Material: C37; Port Size: 1/2, Orifice Dia.: 15), Voltage/Electrical Entry: G (24VDC; DIN Terminal w/Surge Voltage Suppressor), Other Voltages and Electrical Options: None, Other Options: B (NPT Thread)