Quick coupling plug KS3-1/8-A-R With non-return valve for self-closing quick coupling connectors on both sides Nominal size=4,2 mm, Operating pressure complete temperature range=-0,95 - 12 bar, Operating medium=Compressed air in accordance with ISO8573-1:2010 [7:-:-], Note on operating and pilot medium=Lubricated operation possible, Corrosion resistance classification CRC=1 - Low corrosion stress