Starfavor Drum Throne, Swivel Type Height adjustment is screw-type, so you can easily adjust it by turning the seat. The seat height can be adjusted from 45cm to 60cm. It has a double-braced leg construction for stability. It has only been used indoors on carpet, so the rubber feet are also clean. The metal parts are clean with no corrosion or dullness. Please refer to Amazon↓ for details and many reviews. https://amzn.asia/d/1BcricG By the way, many of the people who wrote "broken" or "wobbly" in the Amazon reviews are using it incorrectly. The Amazon product page states "Grit nut strengthens the grip of the rod," but if you don't tighten this properly, it will wobble (photos 8-9). I understand the feeling of not wanting to tighten it because it makes it difficult to rotate the seat while sitting, but I think that using it without tightening it puts a strain on the joints and causes it to break. If you purchase it, please don't hesitate to tighten this screw firmly. There are no smokers or pets in the house, and there are no particular odors. We would appreciate a brief comment after purchase.