FEM: Problem with Meshing

Hello,

I want to generate a 3d-meshing vor a volume with consists of 2 different regions.
These 2 regions should a different MaxCellMeasure.
This is my code which works, but with just one MaxCellMeasure.

Does someone know, how I can define two different mesh resolutions for
the 2 volumes zylinderInnen and mantelVolumen?

Thanks and kind regards
Dirk