The Rolling Lobe Air Spring - AS9121 is a practical replacement for various OE parts, including Automann AB1D28G-9121, ContiTech 64272, and Firestone W01-358-9121. With dimensions shown in the images above, this air spring is sold individually and fits a range of vehicles. Its rolling lobe design provides a smooth ride and improved handling, making it a reliable choice for drivers seeking a comfortable and safe driving experience.