in accordance with DIN 68877 - user-friendly gas spring seat height adjustment with all-round ring release - blue ring cover to protect the upholstery - seat Ø 400 mm, with Supertec fabric upholstery comfortable, breathable, very hard-wearing thanks to micro-armoring, cut-resistant, non-slip, easy to clean - five-legged plastic base frame Ø 540 mm with soft universal castors for smooth rolling over all floors