FESTO Pneumatic Valves Magnetic valve 612406 - FESTO 9857, The FESTO Magnetic valve 9857 MFH-3-1/2 is designed with a nominal width of 14 mm and features G 1/2 connections. It is suitable for controlling all fluid types, including water flow, in various industrial applications. This durable valve ensures reliable and efficient operation in automated systems. FESTO 9857 Magnetic valve MFH-3-1/2 G1/2 14mm 1pc