This is a stand purchased from STI. I tried 40°, 50°, and 60° and found that 50° suited me best, so I'm selling the others. The build quality is solid, and it's stable compared to other products, with no wobbling or looseness. I'm also listing the 60° version, so please take a look if you're interested. ※The MX ERGO mouse in the image is for illustrative purposes only and is not included.