Herman Miller Aeron Replacement Pneumatic Cylinder. Easy Installation & Durable. This listing is for a brand new, never-used CLASS 4 pneumatic gas lift cylinder designed specifically for the classic Herman Miller Aeron chair, ensuring optimal performance and longevity. Enjoy effortless seat height adjustments with a 5.0 stroke, allowing for a seamless transition from the lowest to the highest seating positions. CLASS 4 pneumatic gas lift cylinder with a load capacity of 400 pounds. 5.0 stroke provides ample adjustment range for maximum comfort. Cylinder Diameter: 28mm (1.1), Column Diameter: 50mm approx. Compatible with Size A, B, and C Aeron Chairs. Exceeds ANSI/BIFMA5.1-2011 standards for quality and durability. 5- replacement ensures peace of mind. Why Choose Our Pneumatic Cylinder? Revitalize your seating experience with our state-of-the-art replacement pneumonic cylinder, tailored for the iconic Herman Miller Aeron chair. With an impressive load capacity and smooth height adjustment, this cylinder brings both comfort and functionality back to your workspace. Don’t let an old or malfunctioning gas lift cylinder disrupt your productivity. Invest in superior quality and meet the highest industry standards with our exceptional replacement part. Enjoy a 5-, allowing you to focus on what matters most – your work. Order today to restore your Aeron chair to its glory and experience unparalleled style and comfort!