short rib, thanks for the hint.
I bought them from a friend, who bought them more than 10 years ago and never installed them. That's all I know.
I gave the rim to a specialist who welds magnesium and has his own business repairing rims and he refused to weld it. The rim itself also has a massive radial run out (hope thats the correct word) and had 80gramm alone without tire.
I will definitely not use the rim and won't sell it to anyone.