PD,
That supplier does not make arrows. Pictures are of arrows made by others with his shafts.
I have dealt with him for Arrow Bamboo shafts and seen Tonkin shaft samples. Those Tonkin shafts I saw were of enormous spine rating. I am trying to pursuade him that spine is of some relevance in archery and that shaft diameter must be reduced.
If you shoot a centre shot bow of high draw weight where spine doesn't much matter then you may be OK. Otherwise you may find that many out of the batch you buy are just too stiff.
Mark in England