This is a left/right set of Remastered Aeron armrests with armpads. They are in decent used shape. Taken off a used 2018 Remastered Aeron recently. These are height-adjustable only. The armpads do not swivel, nor do they move back and forth. If you need “4D” Remastered Aeron armrests then look at my other listings. These can technically be fitted to a Classic Aeron — message if you need assistance. These armrest yokes will physically bolt up to the Classic Aeron’s swing arms… If you don’t understand what this means, then, this swap may be too advanced for you.