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In this video Kramer says they are Chosera stones, made by Naniwia. (0.10)https://www.youtube.com/watch?v=-3suCV1UqMc

No 5k, but do have a 1,4,8 and 12k Super Stones and they all load up.

If it does not load and is a good fast cutting polisher it is probably not a Super Stone.

Interestingly these stones have...

If they load up, they may be Super Stones, but I do know that the 8k Snow White is like none of the other Chosera line. I have heard good thing about the 10k but do not have one. I have heard the...