https://cad.onshape.com/documents/4bcfe478c3a8d738998fb396/w/31b4a1c2d937511e77983be9/e/ca7cceaf1666

I am designing the heat exchanger for the portable air cooler. I want to extrude the 4 circles through all of the heat exchanger fins and replace the circles with tubes going through all of them. Please show me how to accomplish this feat.…