... . The product line of pneumatic fittings contain the metal push-in fittings rapid pneumatic fittings, rapid pneumatic fittings for plastic tubes, banjo pneumatic fittings, etc.Pneumatic Pipe FittingsTube OD: 04 ... , PU, Teflon tube.Adaptability: Hot and cold water systems, steam, machine tool, lathe suchas application if corrosive environment SP series. pneumatic pipe fittings