Genuine Herman Miller Aeron Office Desk Chair. Genuine Herman Miller Aeron Office Desk Chair – See pictures of the actual chair for sale. This is a Genuine Authentic Herman Miller Aeron Chair. Aeron Medium Size B – Posture Fit, Polished Aluminum, Tuxedo Pellicle, Grey Black + Black Leather Armrests. See pictures for exact chair for sale in this listing. You can come see and test the chair in our San Diego (Poway) showroom. We accept most major credit cards in our showroom.