This carbon XT-30 rods have a special structure.
You can't see but you you will notice it when you catch the rod and start fishing.
When you holding the rod you will feel its power immediately.
The action blank on the ends of the rod allows to move the fish in all directions, and still it will be left force in the rod base.
In the photo Shimano Catana rod 16-20 lb StandUp fishing action with a 17 kg tuna.