.Heavy-Duty Replacement Gas Lift Cylinder for Herman Miller Classic Aeron Chair (Pre-2013) Top Activated Pneumatic Lift Class 4 Hydraulic Piston, Fits Sizes A, B, & C 450 lbs Capacity

Is your favorite Classic Aeron chair slowly sinking while you work? Dont let a failing gas cylinder ruin your posture or productivity. Our Top-Activated Replacement Gas Cylinder is the most reliable, cost-effective solution to restore the legendary comfort and support of your Classic Aeron. Engineered for Performance and Longevity Most standard cylinders use Class 2 or 3 pistons. Weve upgraded this model to a Class 4 Heavy-Duty Piston, the highest grade available for office furniture. This means enhanced stability, a higher weight ceiling (up to 450 lbs), and a seal that won't leak over time. It is specifically designed for the top-activated mechanism found in Aeron chairs produced between 1994 and mid-2013. Why Choose This Cylinder? Precision Fit: Tailored specifically for the Aeron Classic (Does not fit the "Remastered" 2017+ models). Ergonomic Restoration: Provides a stable, firm height that won't drift, maintaining the ergonomic alignment your back deserves. Cost-Effective: A high-quality alternative repair compared to a full chair replacement. Compatibility Check: Before ordering, please ensure your chair is a Classic Aeron (manufactured before June 26, 2013). These chairs use a "top-activated" system where the internal lever or cable pushes a button on the very top of the cylinder.