Six steps representing the manufacturing model of a hollow pulmonary latex arterial model based on patient data: [1] CAD model from a CT scan of a 72-year-old male patient with no known pulmonary disease, [2] intermediate CAD model with simplified geometry, [3] finalised CAD model including extrudes and flanges for easy connections, [4] 3D-printed model consisting of 11 parts to act as a mold for latex brushing, [5] hollow latex model obtained after latex brushing, curing, and removal of the mold, and [6] finalized pulmonary model in an acrylic box with blue custom 3D-printed connectors for an external circulatory system. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]