Micro Seiki ma-505 x is a low or heavy tonarm?

Thank you so much for the link-)

one question : Where from did you get the number 14,5 gr for ma 505 effective mass?

Well, thank you again, but I found this picture

where it is said that for Ma 505 is ...; 7 gr.

Here is the link ..... I hope it is ok

No, I can not  add this link .... any way it is a micro seiki brochure where it is said that ma 505 effective mass is 7 gr.

You are probably right.... to me, 7 gr seems a bit  too light to be the full effective mass