Aeron Chair Herman Miller

Selling my older model Aeron Chair. Not sure the exact size but pretty sure it’s a standard B size. I’m 5’7” and fits me perfectly. I’ve had it for many years and it’s still in good working condition. The only noticeable wear is on the seat where some threading has come loose in the second picture, but it’s never caused any issues since I’ve always used a seat cover (which I’ll include with the chair). Only other modification are the casters but everything else is original. Not sure of the exact age, but likely around 10+ years old. Despite its age, it still has plenty of life left and functions well.