RIAMTGCX appears once on this site, in ergonomic footrests, with its tilting footrest.
A load you can check. Up to 40 kg (88 lb) — the only load rating published in the hub. The Fellowes, HUANUO and QUXV give none.
The platform. 42 × 30 cm (16.5 × 11.8 in), textured so feet do not slide, with padding underneath that keeps the footrest in place. It is the narrowest of the three published platforms, though deeper than the HUANUO’s 43 × 28 cm; the Fellowes is the largest at 44 × 33 cm.
Height and tilt. It adjusts at several points between 9.5 and 15.5 cm (3.7 and 6.1 in) and tilts, according to its title — but neither the number of positions nor the angle is given. That 6 cm (2.4 in) range is the narrowest published in the hub, topping out 1.6 cm below the HUANUO’s 17.1 cm. Setting up a new office chair shows how high your feet need to come up.
Claims we do not repeat. The listing leans on overall health, circulation and the spine; a footrest changes where your feet rest, which is checkable, and nothing more.
Where to buy it. It is not listed on Amazon.com, so from the US the button opens a search.