Just to let you know. I ordered and placed USA Swiss nozzles into my Wanhao 4S printer. They work great, what an improvement!
Before I couldn't print at 100 micron, but now I can even print with 50 micron without problems! How cool is that. 50 micron above the machine specifications! Try go get lower it somewhat more these day's
I can recommend this to every Wanhao 4S user!