Gas Cylinder Replaced Aeron Remastered Manufactured Feburary 2024. My desk is near 37 inches, so the gas cylinder was replaced with higher gas cylinder from OEM (SHS). If you want I can give you the original cylinder and replacement toolkit as a gift. The quality of aeron’s og cylinder is not good, keep that in mind. I found that maybe Mirra 2 is better than Aeron, just my personal taste.