Great thin brush. One single hair shed. Was great for lubing stems and housings with 3203. The brush was small enough that I didn't accidentally hit the tactile legs.
Does the job and is convenient to buy with lube on Divinikey because it's already here, but you aren't missing out on much if you can find a similarly priced or cheaper brush.
The bristles are a bit small, other than that, no complaints, I love everything Divinikey :) (Plus, you get one of their famous stickers for free!)
I bought this and 205g0 to lube my holy pandas. Both worked perfectly and I lubed my first set of switches for my first mechanical keyboard project! In my very limited experience I would say that this brush was the perfect size. I was able to get the lube just where I needed it and nowhere that I didnt.
Overall the brush isn't bad, but for me the bristles are just cheap. They started separating and started to just fall off, which was really surprising. It may just be the batch just I got, but not sure.