Stiffener Definition for Flex Boards

For standard Flex Boards (non-ridged-flex) how can we define stiffener positions and thicknesses?

I don’t see an option to check for stiffeners required either.

Hello Tim,

Yes that is fine, just make sure you include the details in your files and upload them to the Advanced PCB service. The engineers will review the files and get back to you with a quote,

Advanced PCB service: