Nissin 450ZX Medium
Where I fish, I don't catch a lot of big fish, so I really have not explored the limits of the medium rod, the 硬中硬. as Coach would say, the limit is whatever can you catch with 6X tippet.
I suspect it will be a very capable rod for trout in the 16-20" category, and probably any bass you're ever going to hook. However, it is a trout rod, it's not a rod for salmon or steelhead!
The rod measures 30.5 pennies at both lengths (4m and 4.5m).