Aeron Chair by Herman Miller - Official Retailer - Basic - Titanium Frame - Zinc Classic Size B (Medium) - Leather Arms Aeron Basic Model: Non-Adjustable Leather Arms , No Lumbar Support and No Tilt Limiter and Seat Angle Adjustment 12-year Herman Miller warranty with Born-On-Date sticker. The new benchmark in the arena of ergonomic office, seating Aeron Chair by Herman Miller - Official Retailer - Basic - Titanium Frame - Zinc Classic Size B (Medium)