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Is this a legit herman miller aeron classic? Have never seen gears like things on the arm adjust. : r/hermanmiller
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Aeron Herman Miller Office Chair Size B Fully Adjustable Arms, Tilt Limiter and Seat Angle Adjustment, Adjustable Lumbar Pad (ʀᴇɴᴇᴡᴇᴅ) - Walmart.com
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