manifold block MHA1-PR4-3-M3-PI with base plugs, for manifold block valves MHA1-...-PI Max. number of valve positions=4, Operating pressure=0 - 8 bar, Operating medium=Compressed air in accordance with ISO8573-1:2010 [7:4:4], Note on operating and pilot medium=Lubricated operation possible (subsequently required for further operation), Corrosion resistance classification CRC=1 - Low corrosion stress