Replacement Chrome Lift Cylinder for Your Office Chair; Heavy Duty, Fits Aeron and Most Other Chairs ARE YOU TIRED OF YOUR CHAIR BEING A LOW RIDER? - You can make it good as new with this replacement lift cylinder. EASY TO DO - It only takes a few minutes and a few common tools to complete this easy repair. Detailed instructions are included with your replacement cylinder. THIS CYLINDER IS THE STANDARD SIZE AND WILL FIT AERON AND MOST OTHER CHAIRS -- The bottom of the cylinder, which goes into the base (the part with wheels) is 2 inches across. The shaft on top of the cylinder, which goes up under the seat, is 1 inch across. You should measure, but chances are it will fit. HEAVY DUTY - This replacement cylinder is built tough and will offer years of service. It will lift your chair 5 inches. It is 10.5 inches at its shortest and 15.5 inches at full length. PEACE OF MIND - No phony baloney reviews here; We do not give products away in exchange for reviews; we earn your review by offering a quality product. If this part does not work on your chair, we will give your money back. We are committed to having satisfied customers.