What Class T fuse for my Ruixus ?

[tomy2]

[ American Boat and Yacht Council uses a much more permissive ampacity chart.] DAM, I'll need to move everything onto my yacht!

 

[GregM]

I found this fuse-block/fuse at Amazon.
Would it be ok with a single run of 4/0?

This fuse arrived and box said 300A, but when I looked at the body of the fuse it says 200A.
Returned
When they issue the credit I will buy the Blue Sea fuse block with matching fuses in 300A