Hi Anis,

I was able to create a centerline through copied circles at the surface edges and extend them together. I then established the bend radii by creating three point circles at the outside and inside bend radii edges. The two bends at the end are 60mm and the ones in the middle are 30mm, from my calculations. I then used a script I got from Michael G. to extract the overall length of the tube. The attached file has the centerline geometry and the text shows the overall length.

Hope this helps.

Michael T.