This is a parametric condensor developed using OpenSCAD. Most attributes about the condensor can be changed and modified using the OpenSCAD customizer. Just input the desired values for the condensor and print away. The OpenSCAD file does include libraries developed by Rudolf Huttary. These libraries can be found here: NACA airfoil sweep - OpenSCAD library & springs and springmaker - OpenSCAD library. A commercial equivalant for this would priced at around $30, this model can be made at a fraction of that cost.