I ordered these stands to put my 7 inch Adam monitors on (9 kg). Well under the maximum weight. Unfortunately these stands are such poor quality that they're almost entirely unuseable.
Immediately when taking the stands out of the package, I noticed that the EVA mats had air bubbles underneath which I had to pop with a needle. Not a big deal but after the rest of the ordeal I later had with these, I wish I'd seen this as a sign of things to come and packed them back up to return.
They came with 4 bolts that are intended to be used to fix the monitor platforms to the stands. No spares, and no wingnuts at all. One of these bolts immediately became damaged just from being finger tightened which meant the monitor platform was just loose. Luckily I had a wingnut in my own personal spares box that fit the thread and was able to secure the platform.
The problems still didn't end. I put my monitors on these stands and the stem itself just wobbles around. This means they cannot stand up straight and are always leaning one way or the other.
I don't think I have ever bought a piece of hardware so unfit for purpose, or with so little in the way of user consideration. I'm sad to have to leave a review like this, but I am astounded. I don't know if they started out good and the quality slipped over time seeing as the rest of the reviews seemed reasonable (which was the only reason I specifically chose these vs different ones), but this can't be ignored.
Use caution.