I've been noticing the variety of nozzle sizes available on Amazon under BIQU's store front. They had SS MK10 sizes from .2 thru .5 but only in qty 5 each. I didn't really want 5 of anything without trying it first. So I wrote them an email suggesting they provide an item with 1x .2mm, 1x .3mm, 2x .4mm, and 1x .5mm. for the same qty 5 price of $13. They wrote back in a few hours and said they would add the listing today. An hour later I received a second email from them with the amazon item listing number: www.amazon.com/dp/B01IUP983Q I've ordered one of the sets. Shipping is "almost immediate" but transit time via China Post is estimated at 3-4 weeks.