Mirra Chair by Herman Miller: Basic - Pneumatic Lift - Stationary Arms - Standard Tilt - Fixed Seat Depth - 2.5" Black Carpet Casters - Shadow Frame/Cappuccino Seat Genuine Herman Miller 12 Year Factory Warranty is INCLUDED! Genuine Herman Miller Mirra Basic Chair - Fixed Arms, no tilt limiter, no seat angle adjustment with a fixed lumbar support. Mirra is an innovative blend of passive and active adjustments that provides a new reference point in performance, aesthetics, and value. The 12-Year Warranty covers everything that makes a Herman Miller Office Chair--including casters, tilts, pneumatic cylinders, and all moving mechanisms.