UniluxNymphea Ergonomic Footrest, Adjustable Height and Adjustable Tilt, Black

Comes ready assembled (unless you want to adjust the height before use). Looked a little flimsy, but was pleasantly surprised when I put it to use under the desk. The rocker facility allows you to sit at your desk and fidget with your feet, which can be invaluable. Would have been better to have two footplates with individual rocker movement, maybe a design improvement for the future?