These are genuine Bosch, not Chinese crap; these are the 220/300bar bodies. I took them apart (in surgical conditions) just this morning and fitted the brand new Bosio nozzles.

These were the R520 nozzles prior to fitment (you cant see any number when they are fitted!!):

I'm looking at £400 ono inc worldwide shipping for them, the cheapest you would get them for anywhere else would be well over $800/£500. I've not has them balanced as there are more competent people in the US IMO but I can get it done for £50 if required.
Check my other topic for some Complete BRAND NEW Bosch .216 injectors a set of new .216 nozzles and a set of stock 1Z injectors!!
Cheers
Ry