These are one of the greatest bargains around for building on a budget; you're really getting a lot of motor for the money. On the down-side, while two of the motors were in perfect condition, the other two were missing the grub/set screws securing the bells (get some m3x3mm set screws on ebay if you need them) and had some minor marks on the finish. However, they fly absolutely fine! If you're trying to build <250g it may be challenging with these, but just about possible with the right battery choice on a 4 build. They would make more sense on a typical 6s 5 setup.
F20192-F20193