Technical specifications of the devices used in the generation of micro bubbles. (a) 3D printing-based prototype specifications. (b) Micro fluidic device manufactured using 3D printing with 0.40 μm channels. (c) Hybrid prototype specifications including 3D printing and micro capillary placement. A channel with 1 mm is used for positioning a micro capillary with internal diameter of approximately 20 μm. (d) Hybrid Micro fluidic device based on 3D printing and micro capillary.