I found the inox 6004 good to replace the big one on os 1.60 fx at 1.95 sterlin , boca sells at 15/20 dollars ,can I trust these bearing?

Only 1 way to find out. just make sure they are EXACTLY the same size and see how they hold up.
dan

thanks for the answer but I was looking for someone that was already using these bearing,scared by the astronomic price from boca

rc-bearings.com has much less expensive replacements than Boca, and I have been using them in my 120AX.