As another reviewer mentioned, this is the (slightly larger) update kit for the deprecated 1.5mm needle/nozzle kit.
tl:dr This isn't what I wanted, but it was exactly what I needed. I had a heck of time dialing-in the 1.5mm needle. God forbid I should hotswap my 3.5 Iwata quickconnect to do some grunt priming, because that would blow up my compressor settings and I'd have to reset for the fussy H&S all over. The 1.5 needle would bend with a stern glance. I went through four needles in a year because I'm clumsy.
So when I was forced to replace with the 2mm needle... POW! ZOOM! BANG! Oh. My. Gosh. My Infinity CR plus is now PERFECT. This now totally replaces my beloved Sotar 20/20 that I could never get part for. This is everything I need in a detail brush.
Sorry to wax on about a flippin' airbrush needle/nozzle, but I absolutely love this setup. If I had this 2mm needle from the jump, I never would have bought the Sotar because this setup is perfect.