The concept of Mixing Tube is developed for convenience. It is used inline for applications such as Water Jet cutting devices, post extruder mixing of additives prior to a Die or Mould, Agriculture Spray of irrigation. Depending upon the flow rate, densities and especially viscosities one of the concept described here such as ‘Static Mixers’ or ‘Eductors’ may be used for the design and manufacture of Mixing Tube. Mixing Tubes are application specific. Their MOC (Material of Construction is also so chosen).